# 15th Greater Poland Light Artillery Regiment

15th Greater Poland Light Artillery Regiment was a unit of light artillery in the Greater Poland Army [pl] and the Polish Armed Forces during the Second Polish Republic.

## Formation and battles

The first subunits of the future regiment were formed on 30 December 1918 at the White Barracks on Magazynowa Street in Poznań. From there, they departed to the front, where they were organized into batteries and squadrons. On 19 January 1919, the Polish Armed Forces Command in the former Prussian partition ordered Lieutenant Colonel Anatol Kędzierski to begin organizing the 1st Greater Poland Light Artillery Regiment. On 6 March 1919, these artillery subunits formed the regiment. On 21 September 1919, the unit was renamed to the 1st Greater Poland Field Artillery Regiment. During the conquest of Pomerania, the regiment was renamed the 15th Greater Poland Field Artillery Regiment. In September 1920, the regiment was equipped with German 77 mm field guns and 105 mm howitzers.
Personnel composition between 1919 and 1920 :
| Commander of 1st squadron | Major Rudolf Niemira [pl] (until 8 October 1919) |
| Commander of 1st squadron | Lieutenant Jerzy Cegielski [pl] (from 8 October 1919) |
| Commander of 1st battery | Second Lieutenant Kazimierz Nieżychowski [pl] |
| Commander of 2nd battery | Captain Stanisław Adam Kamiński |
| Commander of 2nd battery | Lieutenant Józef Muślewski [pl] |
| Commander of 3rd battery | Second Lieutenant Marian Breliński |
| Commander of 2nd squadron | Major Brzeski |
| Commander of 2nd squadron | Major Dębski |
| Commander of 4th battery | Lieutenant Michał Chłapowski |
| Commander of 4th battery | Second Lieutenant Stefan Tadeusz Wypijewski |
| Commander of platoon (called "Kujawianka") | Gunner/Second Lieutenant Stefan Tadeusz Wypijewski |
| Commander of 5th battery | Lieutenant Suzin (1919) |
| Commander of 5th battery | Lieutenant Jan Heine [pl] (1920) |
| Machine gun crew | Corporal Biskup (Cross of Valour) |
| Battery officer | Second Lieutenant Józef Lorek †26 July 1920, Ostrów |
| Commander of 6th battery | Second Lieutenant Jasiński |
| Commander of 3rd squadron | Lieutenant Colonel Więckowski |
| Commander of 7th battery | Second Lieutenant/Lieutenant Jerzy Cegielski [pl] (until 8 October 1919) |
| Commander of 7th battery | Captain Leon Bogusławski |
| Battery officer | Lieutenant Ludwik Niewodniczański |
| Commander of 8th battery | Lieutenant Raszewski |
| | Cadet Żółtowski (Cross of Valour) |
| Commander of 9th battery | Second Lieutenant Marian Kaźmierczak |
| Battery officer | Second Lieutenant Marian Bieniak (Cross of Valour) |
| | Sergeant Rozmiarek (Cross of Valour) |
| | Sergeant Dirska (Cross of Valour) |
| | Corporal Spychaj (Cross of Valour) |
| Machine gun aimer | Bombardier Bachorski (Cross of Valour) |
| Conductor of the orchestra | Military official Mackiewicz |
* Maps of the regiment's battles

### Recipients of the Virtuti Militari

Soldiers of the regiment awarded the Silver Cross of the Virtuti Militari War Order :
| Bombardier Marian Berger | Captain Leon Bogusławski | Second Lieutenant Marian Breliński |
| Corporal Antoni Bródka [pl] | Major Jerzy Cegielski [pl] (No. 1434) | Second Lieutenant Michał Drozdowicz |
| Sergeant Franciszek Duszyński (No. 4668) | Captain Władysław Dzieżgowski | Lieutenant Jan Heine [pl] |
| Lieutenant Marian Kaźmierczak (No. 4328) | Second Lieutenant Adolf Karłowski | Second Lieutenant Józef Lorek |
| Bombardier Stanisław Michalak | Lieutenant Józef Muślewski [pl] (No. 939) | Lieutenant Colonel Rudolf Niemira [pl] |
| Lieutenant Ludwik Niewodniczański | Lieutenant Kazimierz Nieżychowski [pl] | Captain Wiktor Rossa |
| Platoon Leader Ignacy Rychłowski [pl] | Corporal Antoni Sawiński | Bombardier Jan Spychaj |
| Bombardier Ludwik Woś | Corporal Tadeusz Żak | Captain Michał Zenkteler [pl] |

## Regiment in peacetime

On 2 December 1920, the regiment arrived in the Bydgoszcz Garrison [pl], where it remained stationed until 1939.
On 31 December 1931, based on the order of the Minister of Military Affairs, Marshal Józef Piłsudski, the 15th Artillery Regiment was renamed to the 15th Light Artillery Regiment.
On Sunday, 26 August 1938, two ceremonies were held in Bydgoszcz. In the Old Market Square, the ceremony for the welcome of the 15th Artillery Regiment and the 11th Light Artillery Regiment's [pl] standards took place. The ceremony began at 9:30 AM with the performance of a generals' march to welcome Brigadier General Stanisław Grzmot-Skotnicki. Then, a field mass was held in the courtyard of the Bartosz Głowacki Barracks. After the mass, the commanders of both units swore their soldiers on the standards. Later, Colonel Wojciech Stachowicz performed the act of awarding the regiment's commemorative badge to the city of Bydgoszcz. The badge was received by Mayor Leon Barciszewski [pl], who then presented the regiment with the city's coat of arms. After the decoration, a young Poleshuk, Tomasz Hryciuk, who had arrived at the regiment's invitation with Maria Hryciuk from Zamroczyn, in the Stolin district, gave a heartfelt thank-you speech to the soldiers and officers for their care. The regiment had supported the school in that village. The ceremony concluded with a parade.
Personal composition and organizational structure in March 1939 :
| Regiment commander | Colonel Wojciech Stachowicz |
| First deputy commander | Lieutenant Colonel Jerzy Jan Leonhard |
| Adjutant | Captain Bogdan Roman Szczerkowski |
| Medical doctor | Second Lieutenant Bolesław Januszewski |
| Veterinary doctor | Second Lieutenant Romuald Hayder |
| Reconnaissance officer | Captain Wacław Kosmowski |
| Second deputy commander (quartermaster) | Major Leon August Jan Rzepecki |
| Mobilization officer | Captain Stefan Dumało |
| Deputy mobilization officer | Captain Zdzisław Michał Dmowski |
| Administrative and material officer | Captain Stanisław Sidorenko |
| Economic officer | Second Lieutenant Michał Pracki |
| Food officer | Sergeant Ignacy Frąckowiak |
| Platoon commander (communications) | Captain Czesław Berezowski |
| Platoon officer | Second Lieutenant Józef Siwek |
| Non-commissioned officer school commander | Second Lieutenant Zygmunt Zublewicz |
| Platoon commander | Second Lieutenant Mieczysław Silkowski |
| Platoon commander | Second Lieutenant Stefan Luśniak |
| Platoon commander | Second Lieutenant Jerzy Kazimierz Makowski |
| First squadron commander | Major Wiktor Wątorski |
| First battery commander | Captain Jerzy Bugajski |
| Platoon commander | Second Lieutenant Ksawery Dokurno |
| Second battery commander | Captain Stefan Józef Dębski |
| Platoon commander | Second Lieutenant Jan Władysław Krajewski |
| Second squadron commander | Major Zygmunt Wituński |
| Fifth battery commander | Captain Stefan Marian Świerczyński |
| Platoon commander | Second Lieutenant Kazimierz Marian Adam Zimnal |
| Sixth battery commander | Acting Second Lieutenant Apoloniusz Zawilski [pl] |
| Platoon commander | Second Lieutenant Wiesław Adam Annusewicz |
| Third squadron commander | Major Walery Krzyżyński |
| Seventh battery commander | Captain Andrzej Szwejkowski |
| Eighth battery commander | Captain Stanisław Taczanowski |
| Platoon commander | Second Lieutenant Aleksander Kułakowski |
| Assigned | Second Lieutenant Stefan Bancer |
| In training | Captain Aleksander Kostrowicki |

## 15th Light Artillery Regiment in the September Campaign
### Mobilization

The 15th Light Artillery Regiment, during the alarm mobilization in the blue group, mobilized its organic subunits on wartime staffing in Bydgoszcz on August 24 from 08:00 AM, within the time frame from A+24 to A+54, as a mobilizing unit. Additionally, according to the mobilization plan "W" [pl], it formed subunits for its parent division in the blue group from A+54 to A+60:
* Horse-drawn transport column No. 812
* Horse-drawn transport workshop No. 809
* Weapon park platoon No. 802
During the requisition of horses, wagons, harnesses, and transport equipment, sabotage was encountered in the areas of Nakło, Mrocza, and Prędocin, primarily from the German-descended population. In the 2nd Squadron, mobilization proceeded without major issues. However, there were shortages of uniforms for some reservists due to delays caused by overloads in the supply depots in Bydgoszcz.
On August 25, the squadrons were dispersed from Bydgoszcz; the 2nd Squadron to Osielsko and Niemcz, the 1st Squadron to Osowa Góra and Czyżkówko. The regrouping of the entire regiment was completed by August 27. The 15th Artillery Regiment headquarters was located in Morzewiec, the 1st Squadron in Jachcice, the 2nd Squadron in the Janowo farm, Smukła Seminary, and the carbide factory, and the 3rd Squadron in Samociążek. Training and team integration of the horses was initiated. On the evening of August 27, the 3rd Squadron was moved to the Luchowo Forestry Lodge, where it arrived on the morning of August 28. By August 30, the 3rd Squadron command had recognized the area of Trzemiętowo as the future operational zone for the squadron. On August 30, an alarm was declared, and the regiment took up combat positions. The 3rd Battery of the 15th Artillery Regiment positioned near Witoldowo, the 2nd Battery near Wojnowo, and the 1st Battery near Osowa Góra. The 3rd Battery of the 16th Artillery Regiment secured an advanced position, providing support to a company outpost from the 61st Infantry Regiment in the village of Nowa Dąbrówka. Observation points were established: the main one in Kruszyn and the forward one in Nowa Dąbrówka. The 2nd Squadron advanced the 4th Battery to the Chmielów area. The 3rd Squadron advanced the 9th Battery to the Wierzchucice and Wierzchucinek area.

### Combat operations
#### Defense of the Bydgoszcz bridgehead

On September 1, the 15th Regiment carried out artillery fire on the border region where units of the German 50th Infantry Division had infiltrated, in the area of Wiktorówko, Badecz, Wysoka, Łobżenica, and Wyrzysk. The 2nd Squadron of the 15th Regiment fired on the German "Netze" Infantry Brigade near Nakło, halting their movement.
On the morning of September 2, due to lingering fog, the regiment did not fire on German troops but was instead shelled by German artillery at the observation point of the 9/15 Squadron, resulting in some casualties. After the fog lifted, the 3rd Squadron of howitzers shelled two German batteries in the area of Teresin farm and Gliszcz village, forcing them to cease fire and possibly destroying two guns. The 8/15 Squadron shelled two advancing columns of German infantry observed from Trzemiętowo. Around 2:00 PM, the 9/15 Squadron came under inaccurate German artillery fire but managed to return fire with approximately 260 shells before retreating to the main defensive positions. In the evening, the observation post of the 3/15 Squadron was shelled, and at 6:00 PM and 7:00 PM, the 15th Regiment shelled German positions at hill 120.
During the night of September 2–3, the 15th Regiment, excluding the 3rd Squadron, regrouped from Mochle and Morzewiec to positions west of Bydgoszcz to support the 61st and 62nd Infantry Regiments. The 3rd Squadron crossed the bridge at Smuka on the Brda river and provided support to the 59th Infantry Regiment on the northern section from Borówno Lake to Gądecz village. After some adjustments, the 3rd Squadron was reassigned to support the 62nd Infantry Regiment in the Szczutki area, near Łącznica Manor. The 2nd Squadron took up firing positions near Osowa Góra.
On September 3, starting at 07:00 AM, the German 50th Infantry Division attacked the Bydgoszcz bridgehead three times in the Tryszczyn and Szutki area. The 3rd Squadron of the 15th Regiment effectively shelled German infantry in the Mochle and Wojnowo areas. On the Tryszczyn-Wojnowo road, concentrated fire from the 3rd and 1st Squadrons destroyed many German trucks transporting infantry and supplies. The 1st Squadron shelled the Nakło-Bydgoszcz road, while the 2nd Squadron fired towards Wtelno and Koronowo. In the morning, German artillery heavily shelled the infantry's defensive positions. The 8/15 Squadron destroyed a German observation post and vehicles carrying infantry. In the afternoon, the 2nd Squadron's positions were detected by a German reconnaissance aircraft and shelled by German artillery, while the observation post of the 1st Squadron and its ammunition column were bombed. The 1st Squadron lost several gunners and horses.
The 3rd Squadron supported the defense of the 59th Infantry Regiment and the Bydgoszcz Home Defense Battalion [pl] on the northern sector, with the 7/15 Squadron contributing to the repulsion of German attempts to cross the Brda river. Starting in the afternoon, the 9/15 Squadron shelled German positions. At 09:00 AM, a diversionary attack in Bydgoszcz was launched. To suppress the rebellion, a 50-man unit was formed from the supply and transport departments of the 15th Regiment. During the night of September 3–4, the 15th Regiment began its retreat. The regiment's supply department, as well as all retreating batteries of the 3rd Squadron, lost several wounded soldiers and horses. The 9/15 Squadron suffered heavy losses and was forced to fight near the Bydgoszcz Canal bridge, actively engaging in countering the diversion. The 1st and 2nd Squadrons retreated through Lisi Ogon and Drzewice to Białe Błota. The 2nd Squadron was attacked by diversionary groups, and the 5th Battery suffered personnel losses and lost communication equipment, while the 6th Battery lost several wounded gunners and horses.
The regrouping towards Toruń, initiated in the afternoon of September 3, was completed by the morning of September 4. At noon on September 4, the 2/15 Squadron shelled marching German infantry and transport columns on the road from Kruszyn to Pawłówka. Both the 2nd and 1st Squadrons later shelled a German motorized infantry unit advancing towards Bydgoszcz. In the afternoon, the 3rd Squadron came under shellfire from Fordon. On the evening of September 4, the regiment continued its retreat. The morning saw the squadrons take up positions: the 3/15 Squadron near Kabat village, the 1/15 Squadron south of Brzoza, and the 2/15 Squadron near Łęgnów and Otorowo.
On September 6, the 2/15 Squadron effectively supported the defense of the 59th Infantry Regiment near Łęgnów against the German 50th Infantry Division's attack. Meanwhile, the regiment's signal troops engaged in skirmishes with diversionary groups cutting the telephone lines, resulting in several telephone operators from the 4th Battery being killed. Near Piecki and Emilianowo, the 3/15 Squadron supported the 62nd Infantry Regiment in its fight against the German 50th Infantry Division. In the Brzoza area, the 1/15 Squadron supported the defense of the 61st Infantry Regiment. The artillery barrage by the squadron on an intersection near the church in Brzoza destroyed German infantry columns and transport. In the evening, the 2/15 Squadron's fire on a German infantry unit preparing to attack a position held by the 3/61 Battalion led to its disbandment. At 4:00 PM, the 50th Infantry Division attacked through the forests, breaking into the defense of the 62nd Infantry Regiment in Emilianowo. The artillery batteries were unable to provide effective support due to the cutting of 300 meters of telephone cable by the diversionary groups.

#### Retreat operations

On the night of September 6/7, the 15th Artillery Regiment, alongside the infantry regiments, began its retreat to new positions: the regiment's command and the 1st Squadron moved to Wohorze, the 2nd Squadron to Murzynno, and the 3rd Squadron to Kijewo. In some villages inhabited by German civilians, skirmishes with diversionary forces occurred. In Broniewo village, the 4/15 Squadron shelled a German motorized infantry reconnaissance unit.
On September 7/8, the 15th Infantry Division retreated to defensive positions along the line of the Tążyna river, the northern edge of Lake Gopło, and the Parchański and Bachorze canals. At 4:30 PM, the 3/15 Squadron effectively shelled a German motorized infantry reconnaissance unit attacking the 1st/59th Infantry Regiment. During the night of September 8/9, the 15th Regiment, together with the infantry regiments, continued its retreat along the following routes: the 2/15 Squadron with the 59th Infantry Regiment moved to the area of Kąkowa Wola and Miechowice, defending the direction towards Osięciny; the 3/15 Squadron, alongside the 62nd Infantry Regiment, took positions from Kąkowa Wola through Redecz Kalny to hill 100; and the 1/15 Squadron, with the 61st Infantry Regiment, reached the area from the Zgłowiączka river to Redecz Kalny. On this day, the regiment had no combat contact with German units.
On the following night, the retreat continued, and by the morning of September 10, the 1/15 Squadron, with the 61st Infantry Regiment, took up defensive positions along the section from Chodecz to Borzymowice Manor. At the same time, a battery from the 3/15 Squadron, alongside the 1st Battalion of the 61st Infantry Regiment, was assigned to defend Izbica Kujawska. The 2/15 Squadron, with the 59th Infantry Regiment, organized defense along the section from Krukowo to Wilkowiczki. The 3/15 Squadron set up positions at Bogdanowo Manor.
The 3/15 Squadron was withdrawn from Izbica to the Wola Adamowa area. The remainder of the 1/15 Squadron was in reserve at a position near Janowo Nowiny estate. The 3/15 Squadron was stationed at Bodzanowo estate, while the 9/15 Squadron was stationed at Franciszkowo estate near Lubraniec.

#### Battle for Southern Kuyavia

On September 11 in the afternoon, units of the German 50th Infantry Division conducted a reconnaissance by combat of the 59th Infantry Regiment's positions, which were repelled with the support of the II/15 artillery regiment. At 1:30 PM, the 62nd Infantry Regiment, supported by the III/15 artillery regiment but without the 9/15 artillery regiment, launched an assault on hill 99.0, Świerkowo, Nakonowo, and Gołaszewo. The III artillery regiment's howitzer fire was concentrated on hill 99.0, followed by a pursuit fire towards Nakonowo. The assault was successful; the 62nd Infantry Regiment reached the German flank and attacked a German heavy artillery regiment in march. Around 5:00 PM, on the II/61 Infantry Regiment's sector near the Szczytno manor, units of the German 208th Infantry Division, supported by heavy artillery, conducted reconnaissance by combat. The German actions were repelled by fire from the 2/15 artillery battery, and later by the entire I artillery regiment.
On September 12 at noon, the German 208th Infantry Division launched an assault on the defensive positions of the 61st Infantry Regiment and the 86th Infantry Battalion, supported by the I/15 artillery regiment, but this was repelled. A renewed attack at 1:00 PM led to the capture of Szczytno, but a counterattack by the 61st Infantry Regiment pushed the German infantry back to their starting positions. At 3:00 PM, German infantry from the 208th Division, with strong artillery support, launched an attack towards the Niemojewo estate, which was repelled by the combined efforts of the infantry and the I/15 artillery regiment. Several cannoneers and one officer were wounded, and the German artillery destroyed one of the guns in the 1st battery. At 3:00 PM, the 208th Infantry Division also attacked the defense of the I/59 Infantry Regiment; the II/15 artillery regiment played a significant role in repelling this assault, though it lost four killed and sixteen wounded.
Under the cover of the 86th Infantry Battalion and the supporting 5/15 artillery battery, the 15th Infantry Division withdrew in the evening and during the night to the next defensive line. The III/15 artillery regiment, along with the 59th Infantry Regiment, moved to the forest east of Łanięta. The I/15 artillery regiment, along with the 61st Infantry Regiment, moved to the Sujki manor, while the regiment's command relocated to the Strzałki manor. The II/15 artillery regiment, without the 5/15 battery, along with the 62nd Infantry Regiment, defended the line along the Lubieńka river to protect the 27th Infantry Division from the south.
On the morning of September 13, the 5/15 artillery battery, along with the 86th Infantry Battalion, defended a crossing over the Lubieńka River in Kępa Szlachecka. The II/62 Infantry Regiment, with the II/15 artillery regiment, successfully defended the Czerniewice-Grabkowo sector against an assault by a unit from the German 50th Infantry Division. The II/15 artillery regiment conducted a night march to the village of Lubieniek, southeast of Gostynin. In their new positions, the 15th Artillery Regiment received its final resupply of ammunition and supplies.

#### Participation in the battle of the Bzura

On September 14, the 15th Artillery Regiment, together with its parent division, began repositioning towards Gąbin. At 4:00 PM on that day, the 59th Infantry Regiment, supported by the II/15 artillery regiment and the 15th Field Artillery Battalion, launched an assault on Dobrzyków, held by units of the German 3rd Infantry Division. After initial successes, the 59th Infantry Regiment was pushed back to its starting positions. The lack of central artillery control, its fragmentation due to insufficient communication means, led to ineffective artillery use. The III/15 artillery regiment reached the Zofiówka area and, after taking up firing positions, began targeting Dobrzyków.
During the night march from September 15 to 16, the 15th Artillery Regiment repositioned to Budy Stare and Biała Góra. The 3/15 artillery regiment, positioned on the western bank of the Bzura river near Brochów, provided fire against German units on the opposite bank. The battery suffered casualties from German artillery fire, with 2 cannoneers wounded, several horses lost, and a communications cart damaged. The remainder of the 15th Artillery Regiment (without the 3rd, 5th, and 7th batteries) took up positions on the edge of the forest north of Biała Góra, where it continued to fire at German positions, all while being under German artillery fire.
On September 17, after a night march, the 15th Artillery Regiment attempted a crossing near the Witkowice estate. While crossing the ford, the 2/15 and 9/15 batteries came under heavy fire from German artillery. On the right bank of the Bzura river, the 4/15 battery was bombed by 9 German planes, suffering several wounded soldiers and 2 damaged guns. During this attack, the battery split into two parts. One part marched with the infantry towards the Kampinos Forest, while the other remained encircled. The 6/15 artillery regiment also suffered losses from a bombing raid, losing soldiers and horses. The 9/15 artillery regiment also sustained losses in its wagons from German artillery fire.
The 15th Artillery Regiment continued its march towards the village of Famułki Królewskie. The I/15 artillery regiment, near Brochów, deployed its 1st and 3rd batteries to firing positions. At 10:00 AM, an assault by infantry and tanks from the German 4th Panzer Division, supported by aircraft and artillery, targeted the infantry positions. The infantry began to retreat, and the 3/15 artillery regiment lost one gun while covering the infantry. By 3:30 PM, the regiment engaged attacking German tanks, knocking out two. However, the battery was attacked by Ju-87 bombers, losing all its guns and sustaining heavy casualties in killed, wounded, and captured soldiers. Only a small portion of the battery's soldiers managed to retreat.
The 1/15 artillery regiment neutralized several German tanks and, under German fire, withdrew, saving its guns and some of the crews. First Lieutenant Zygmunt Zyblewicz was killed in action. In total, over 40 soldiers from the I artillery regiment were killed, while the remaining survivors marched towards the Kampinos Forest.

#### Fighting in the Kampinos Forest

On the night of September 17/18, the 15th Artillery Regiment gathered in the Famułki Królewskie–Myszory area. In the morning, the march along the narrow-gauge railway tracks from Tułowice to Rybitew began. The 15th Infantry Division column was in constant combat with German patrols, outposts, and armored motorized units. The marching column was split, with the command of the I/15 artillery regiment, the 1/15 artillery regiment, and the remnants of the 3/15 artillery regiment detaching. The fate of this part of the I artillery regiment remains unknown, but Major Wiktor Wątorski was killed on September 18 in Wólka Czosnowiecka.
In the Polesie area, the 8/15 artillery battery came under fire from German artillery, suffering casualties and losing many horses. The crews were then used in foot combat in the ensuing chaos. Eventually, with improvised crews, the battery continued to fire at German positions. Due to shortages and the exhaustion of the remaining horses, the battery was forced to abandon its howitzers. A section of the 4th battery, with two guns, joined the 5th battery, also with two guns. Together, they initially marched towards Modlin. During the march, the 5th battery's gun crew was struck by a German shell, killing or severely wounding the entire crew, killing the horses in the harness, and destroying the gun.
In the evening, the 15th Artillery Regiment regrouped near Cybulice with the remnants of five batteries and 10 guns. On September 19, near Palmiry, the 15th Artillery Regiment's command, along with the remnants of the 4th and 5th batteries, and loose gun sections from other batteries, totaling six guns, remained. Lieutenant Colonel Jerzy Leonhard formed two batteries from these units, which defended Palmiry until September 21. During the breakout towards Warsaw on the night of September 21/22, they fired directly to clear the way for their infantry. Several armored vehicles and cars were destroyed. On September 22, Lieutenant Colonel Leonhard formally disbanded the 15th Artillery Regiment, ordered the remaining guns to be dismantled, and directed the soldiers to break through to Warsaw in groups.
On the morning of 20 September, the remnants of the 15th Infantry Division, supported by the 2nd and 6th batteries, attempted to break through Laski towards Warsaw. They encountered resistance from German units of the 1st Panzer Division and elements of the 228th Infantry Division. Both batteries fired indirect fire, then directly at German positions and armored units. During the fighting, the commander of the ammunition column from the I/15 artillery regiment, Captain Kazimierz Rossa, was killed. Due to strong German resistance in that direction, they broke through towards Młociny. Captain Aleksander Kostrowiecki was also killed. The 9th battery, following a different route, successfully broke through to Warsaw.

#### Defending Warsaw

From September 19 to 25, soldiers of the 15th Artillery Regiment fought their way to Warsaw. The regiment reached the capital with the following officers: Colonel Wojciech Stachowicz, commander of the 15th Infantry Division's Artillery; Major Stanisław Eysmont, commander of the II/15 artillery regiment; and the battery commanders: Captain Stefan Dębski (2nd Battery), Captain Czesław Berezowski (3rd Battery), Captain Zdzisław Dmowski (6th Battery), and Captain Stanisław Sidorenko (9th Battery).
A total of 33 officers and 681 non-commissioned officers and gunners from the 15th Artillery Regiment, along with 271 horses, 2 light machine guns, 2 howitzers, and 2 cannons, reached the city. They also brought part of the ammunition column from the III/15 artillery regiment. The howitzers and cannons were assigned as supporting weapons to the infantry. A composite infantry battery of 250 artillerymen in 3 platoons was formed, under the command of Captain Dmowski. It was attached to the 61st Infantry Regiment, which took positions along Belwederska, Puławska, Belgijska, and Czerniakowska streets.
The artillerymen with the horses became part of the rebuilt mounted reconnaissance platoons. Despite the departure of the reconnaissance platoons and Captain Dmowski's battery, additional artillerymen and guns arrived. An improvised division of the 15th Artillery Regiment was formed, with 34 officers, 552 gunners, 236 horses, and 5 guns. Major Eysmont became the division commander, with Captain Świerczyński, Captain Sidorenko, and Lieutenant Florentyn Orzeszko as battery commanders. Two more gun sections arrived. On September 26, the division, with 7 guns, took positions at the edge of the sports field on Agrykola Street.
On September 27, three gun sections supported the 61st Infantry Regiment's attack on Wawrzyszew, including Captain Berezowski's dismounted battery. Around 20 gunners were killed during the battle. On September 28, the division moved to Łazienki, where it surrendered its weapons the following day.

#### March battery of the 1st Regiment of Artillery

As part of the first wave of general mobilization, a march battery of the 1st Regiment of Artillery was formed by 3 September 1939 at Fort Kniaziewicza, and from September 1 in the barracks of Toruń-Podgórze in the 31st Light Artillery Regiment. Initially, it was commanded by Second Lieutenant Kazimierz Koszarek (reserve), and from August 31 by First Lieutenant Marian Bolesław Mazur (reserve). The battery was equipped with small arms (except for full completion with pistols), horses, and other equipment, but lacked guns. Along with the march battery of the 1st Regiment of Artillery, the battery was subordinated to the commander of the Detached Unit "Toruń", Colonel Aleksander Myszowski.
From September 4 to 6, the march batteries of the 15th and 16th Artillery Regiments in Toruń performed engineering and fortification work and carried out patrol duties. Part of the unit crossed the bridge before its demolition on the morning of September 7, while others crossed using temporary crossings after the bridges were blown up. The batteries then crossed with the attached ammunition column of the destroyed 27th Artillery Regiment from Tuchola Forest.
The two batteries marched on foot through Służewo, Radziejów, Brześć Kujawski to Włocławek, where they arrived on September 9. Before reaching Brześć Kujawski, they fought off a sabotage group, defeating them. They then marched through Kowal, Gostynin, and Gąbin to Sochaczew, where on September 11, they dismantled a sabotage radio station. On September 12, the artillerymen of both march batteries participated in protecting the left flank of the assault on Sochaczew. In the evening, the batteries marched through the Kampinos Forest to Modlin, arriving there on September 14.
After a rest in Modlin, they continued via Jabłonna and reached Warsaw on September 15. As part of Lieutenant Mazur's unit, the march batteries became part of the 1st Infantry Artillery Battalion, under Captain Ehrlich, starting on September 20. Two combat batteries were formed from the 15th and 16th Artillery Regiment march batteries.
From September 25, the infantry artillery battalion was deployed as infantry to fight in Mokotów. Several soldiers were killed due to artillery shelling and airstrikes. The batteries did not directly engage in combat before the capital's surrender, due to the low enemy activity in this sector.

### 15th Artillery Regiment's Surplus Collection Unit

After the conclusion of the alarm mobilization, the Surplus Collection Unit of the 15th Artillery Regiment was organized under the command of Major Zygmunt Wituński. Additional soldiers arrived to the unit after the announcement of the general mobilization. A total of 450 soldiers were gathered in the 15th Artillery Regiment's barracks. About 250 of them, along with the officers and non-commissioned officers of the regiment, were loaded onto a train and sent to Skierniewice on September 2, where they were assigned to the newly established 8th Light Artillery Reserve Center. The further fate of the surplus 15th Artillery Regiment is unknown. It is only known that part of the unit retreated to the eastern regions of Poland, as some officers from the Surplus Collection Unit are listed among those executed at Katyń.
Organizational structure and personnel in September 1939 :
| Command ||
| Regiment commander | Lieutenant Colonel Jerzy Leonhard |
| Adjutant | Captain Stanisław Taczanowski |
| Reconnaissance officer | Lieutenant Ksawery Dokurno |
| Communications officer | Lieutenant Mieczysław Silkowski (until 2 September 1939) Second Lieutenant Józef Siwek |
| Liaison officer | Lieutenant (reserve) Wacław Suligowski |
| Observation officer | Lieutenant (reserve) Kulesza |
| Weapons officer | Second Lieutenant Józef Siwek (until 2 September 1939) Lieutenant (reserve) Antoni Lauferski |
| Topographic and fire platoon commander | Second Lieutenant Stefan Luśniak |
| Head of the office | Senior Sergeant Jan Jankowiak |
| First battalion ||
| Battalion commander | Major Wiktor Wątorski |
| Adjutant | Lieutenant (reserve) Jan Karwicki (until 2 September 1939) Lieutenant Mieczysław Silkowski |
| Reconnaissance officer | Lieutenant (reserve) Tadeusz Krzyżanowski |
| Observation officer | Second Lieutenant Stefan Bancer |
| Liaison officer | Second Lieutenant (reserve) Zbigniew Śmielecki |
| Communications officer | Lieutenant (reserve) Władysław Sass |
| Ammunition column commander | Captain (reserve) Kazimierz Rossa |
| 1st battery commander | Lieutenant Zygmunt Zublewicz |
| Reconnaissance officer | Lieutenant (reserve) Zygmunt Pawlicki |
| Fire officer | Second Lieutenant Jerzy Makowski |
| 2nd battery commander | Captain Stefan Dębski |
| Reconnaissance officer | Second Lieutenant Pantaleon Schultz |
| Fire officer | Second Lieutenant Jan Krajewski |
| 3rd battery commander | Captain Czesław Berezowski |
| Reconnaissance officer | Lieutenant (reserve) Bolesław Szłyk |
| Fire officer | Second Lieutenant (reserve) Tadeusz Zieliński |
| Second battalion ||
| Battalion commander | Major Stanisław Ejsymont |
| Adjutant | Second Lieutenant (reserve) Czeslaw Jankowski |
| Reconnaissance officer | Lieutenant Konstanty Grzywna |
| Observation officer | Lieutenant Aleksander Kułakowski |
| Liaison officer | Second Lieutenant (reserve) Teodor Koślicki |
| Ammunition column commander | Lieutenant (reserve) Erwin Stachowiak |
| 4th battery commander | Captain Stefan Świerczyński |
| Reconnaissance officer | Second Lieutenant (reserve) Czesław Millner |
| Fire officer | Senior Cadet Eugeniusz Janota |
| 5th battery commander | Captain Aleksander Kostrowicki |
| Reconnaissance officer | Lieutenant Zbigniew Koraszewski |
| Fire officer | Second Lieutenant (reserve) Zygmunt Plutecki |
| 6th battery commander | Captain Zdzisław Dmowski |
| Reconnaissance officer | Unknown |
| Fire officer | Second Lieutenant Kazimierz Zimnal |
| Third battalion ||
| Battalion commander | Major Mieczysław Para |
| Adjutant | Lieutenant (reserve) Kazimierz Stojewski |
| Reconnaissance officer | Second Lieutenant (reserve) Stanisław Prosiński |
| Observation officer | Lieutenant (reserve) Julian Kabaciński |
| Liaison officer | Sergeant Ignacy Frąckowiak |
| Communications officer | Second Lieutenant Józef Kubicki |
| Ammunition column commander | Lieutenant (reserve) Bernard Schrötter |
| 7th battery commander | Captain Andrzej Szwejkowski |
| Reconnaissance officer | Second Lieutenant (reserve) Jan Kaczmarek |
| Fire officer | Second Lieutenant (reserve) Józef Dworzak |
| 8th battery commander | Lieutenant Apoloniusz Zawilski |
| Reconnaissance officer | Second Lieutenant (reserve) Stefan Szuchiewicz |
| Fire officer | Lieutenant (reserve) Jerzy Łukasiewicz |
| 8th battery commander | Captain Stanisław Sidorenko |
| Reconnaissance officer | Second Lieutenant (reserve) Zygmunt Stawiński |
| Fire officer | Second Lieutenant (reserve) Henryk Sikorski (until 9 September 1939) Second Lieutenant (reserve) Henryk Kabaciński |

## Regimental symbols
### Standard

On 19 June 1938, in Toruń, Marshal of Poland, Edward Rydz-Śmigły presented the unit with a standard funded by the people of Bydgoszcz. The awarding of the standard and approval of its design were included in the Secret Addendum No. 6 to the Ministry of Military Affairs Orders Journal, dated 17 February 1938, No. 3, item 26.
The standard was made according to the design specified in the Decree of the President of the Republic of Poland dated 24 November 1937 on military and naval insignia, published in the Journal of Laws of the Republic of Poland No. 5 on 28 January 1938. On the right side of the flag, there was a maroon cross, at the center of which was an embroidered eagle surrounded by a laurel wreath. On the white fields, between the arms of the cross, were the number 15, in smaller laurel wreaths.

### Commemorative badge

On 28 May 1926, Major General Daniel Konarzewski [pl], on behalf of the Minister of Military Affairs, approved the design and statute of the commemorative badge of the 15th Field Artillery Regiment.
The badge, measuring 57x38 mm, is diamond-shaped, covered in dark green enamel against a backdrop of crossed artillery barrels of a silvery color. In the center, on a decorative cartouche of patinated silver framed by laurel branches, the number and initials 15 PAP (15th Field Artillery Regiment) were inscribed. The badge was two-piece – for officers, made of silver or gilded tombac and enamelled. It was designed by Wiktor Gontarczyk from Warsaw. In 1939, the initials were changed from PAP to PAL.

## Soldiers of the regiment
### Regiment commanders

* Lieutenant Colonel Anatol Kędzierski [pl] (since 19 January 1919)
* Major Władysław Sczaniecki [pl] (since 5 March 1919)
* Lieutenant Colonel/Colonel Rudolf Niemira [pl] (since 8 October 1919)
* Acting Lieutenant Colonel Leon Zubrzycki (since 8 April 1927)
* Colonel Stefan Maleszewski [pl] (June 1927 – January 1931)
* Colonel Brunon Romiszewski [pl] (January 1931 – December 1934 → Deputy Commander of the Wilno Army Reserve)
* Lieutenant Colonel/Colonel Wojciech Stachowicz [pl] (January 1935 – August 1939 → Commander of the Division Artillery of the 15th Infantry Division)
* Lieutenant Colonel Jerzy Jan Leonhard (24 August – September 1939 → German captivity)

### Deputy commanders of the regiment

* Lieutenant Colonel August Trzos (1923 – May 1925 → Commander of the 10th Artillery Battery)
* Lieutenant Colonel Olgierd Ludwik Mierkowski (June 1925 – November 1926)
* Lieutenant Colonel Leon Zubrzycki [pl] (October 1926 – November 1927)
* Major/Lieutenant Colonel Dr. Karol Myrek (December 1927 – March 1929 → Chief of Artillery of the Wilno Army Reserve)
* Major/Lieutenant Colonel Jan Kulczycki [pl] (27 April 1929 – 3 November 1934 → Commander of the 26th Artillery Regiment)
* Major/Lieutenant Colonel Stefan Mieczysław Mączyński (15 September 1935 – 1937)
* Lieutenant Colonel Jerzy Jan Leonhard (until 24 August 1939 → Commander of the Regiment)
* Major Leon August Jan Rzepecki (Second Deputy Commander/Quartermaster – 1939)

### Victims of the Katyn massacre

Biographies of the victims of the Katyn massacre are available in databases provided by the Ministry of Culture and National Heritage and the Katyń Museum.
| Name and surname | Rank | Profession | Workplace before mobilization | Murdered |
| Adam Lisiecki | Second Lieutenant of the reserve | Teacher, Master's degree | M. Kopernik High School in Bydgoszcz | Katyn |
| Jerzy Bugajski | Captain | Professional soldier | - | Kharkiv |
| Zbyszko Pietruszka | Second Lieutenant of the reserve | Clerk | - | Kharkiv |