List of Imperial Guard Regiments

The following is a complete list of all Imperial Guard regiments created by our authors here on the Warhammer 40,000 Fanon Wiki. This list does not include those elements of the Astra Militarum from user projects such as Dead Millennium, Imperium of Blood, Legiones Astartes, Ruina Imperii, or Shadows Of An Empire.
Regiment 	Homeworld 	Image 	Strength 	Notes
12th Deeprok Light Infantry 	Deeprok 	 	1,500 Soldiers 	The 12th Deeprok Light Infantry, more commonly known as the Deeprok Twelfth was an Imperial Guard Regiment raised during the Saint-Euphrica Crusade. Primarily light infantry, the 12th Deeprok are known as the newest and most inexperienced to come from the desert world of Deeprok. They are well known for their abilities in laying ambushes and using explosives, and their use of zip lines and grappling hooks to flank enemies.
103rd Dimmir Regiment "Korish Carabiniers" 	Dimmir 	 	~1,000 Soldiers 	A dapper looking mechanized infantry regiment from the Kor region of Dimmir. Mostly made out of former drug-runners due to their skill at evading Arbites.
144th 'Caligari Expeditionary' 	None 	 	3,600 + Soldiers 	The 144th regiment to be levied by Segmentum Tempestus Militarum Command for the Indomitus Crusade, it is commonly called the Caligari Sector Expeditionary Regiment, owing to its founding troops being comprised of PDF and other loyalist forces from the Caligari Sector rather than a single planet.
99th Draxian Vipers
("The Lone Survivors") 	Drax
(Nominally)	 	~1,000 Soldiers 	The Ordo Obsuletus, an Ordos Minoris of the Inquisition (actually, a regional conclave), is charged with investigating unexplained phenomena and miracles within the Imperium. They employs a special regiment-sized organization known colloquially as “The Lone Survivors”.
Daughters of Athena 	Caelus Prime 	 	Unknown 	The Daughters of Athena are a collection of Astra Millitarum Regiments raised on Caelus Prime since the 38th Millenium.
1st Adeptus Astra Telepathica Regiment
("Gray Cloaks") 	Holy Terra 	 	1 Regiment 	They are primarily drawn from Terra and serve as the defensive force of the Obsidian Keep. While they are technically a regiment-strength fighting force their duties are mainly security and escorts. They have thrice been deployed en masse and frequently are dispatched in squads as advisors on the matters of containing psykers.
125th Iridos Auxilla (Homo Sacer) 	Iridos IV 	 	1-5 Squads (10-50 abhumans) 	They were an independent unit of ab human specialists, active sometime after the Tyrannic Wars, who acted with infamous skill as agents of Imperium. They were ostensibly a unit from the Imperial Guard’s Militarum Auxilla though they were at time attached to other organization.
Illastran White Guard 	Illastra 	Pict-file unavailable	~150 Regiments 	The Illastran White Guard Regiments hail from the Fortress/Shrine World of Illastra. They're known for their zeal and close relations with the Ecclesiarchy.
1st Ilen Armored Regiment
("The Esu") 	Ile 	 	3,000 Soldiers 	The thunderstruck savannah-world of Ile is home to the elite Imperial Guard force known only as the Esu (Ee-sue). These immensely skilled technicians and soldiers serve as one of the premier armored spearhead units in the Imperial Guard. Calm in the face of fear and exceptionally well educated the soldiers of the Esu are masters of the tank. Complementing the Esu are the Jagunjagun, junior officers who lead crack anti-armor units that often accompany the Esu’s tanks into battle.
Ilen 1st Ranger Regiment 	Ile 	 	~1,500 soldiers 	The 1st Ilen Ranger Regiment, colloquially known as the “Redhawks”, is a light infantry regiment tasked with extended mission, special operations, duty in the Gothic Sector of Segmentum Obscurus. While nominally affiliated with the industrial world of Ile and occasionally garrisoned there, the Redhawks are a composite unit that has had troops from various locations rotated in for duty (particularly as casualties mount). They are often used as an advanced force and specialize in airborne / air assaults, direct action operations, raids, spaceport seizure, recovery of personnel and special equipment, and support of general purpose forces (GPF).
Jerionite Regiments 	Neo-Jericho 	 	12 Regiments 	The 12 Jerionite (Jer-oh-knights) regiments of the Imperial Guard, collectively known as the "The Jerionite Warbands", are an elite unit with a long and colorful history. They were a people whose ancient homeworld was destroyed during the Horus Heresy and they were forced on a long diaspora before being given a new world. Even during their long travels from world to world their regiments served with distinction. Now they are crack regiments filled with religious zeal and are ready to face the worst the foes of the Imperium.
Muspelhani Afriel Commandos 	Muspelheim 	 	~100 regiments 	The Muspelhani Afriel Commandos, also known as the Muspelhani Commandos, are Astra Militarum regiments raised and trained on the Forge World of Muspelheim in the Ailuros System. Unique to the Muspelhani Commandos are that their members aren't recruited from the actual population of Muspelheim. Rather, the troops are grown from barely understood Replicae technology. The fresh genetic material of new countless heroes of the Imperium makes sure that Muspelheim's genetors are never short on hand with genetic material to splice and fuse new replicae which makes the commandos less, but at the same time more, than mere clones.
13th Rapid Deployment Force (Rift Jumpers) 	Neptune 	 	20,000-30,000 (Pre-Deployment)	The 13th Rapid Deployment Force aka “The Rift Jumpers” are a unique Drop Regiment from Neptune. They are stationed close to Holy Terra so orders can reach them quickly- they are supposedly able to deploy to anywhere in the Imperium within 24 hours. Using a secret warp gate these “jumpers” hurl themselves into the warp in small ships and attempt to reach whatever critical destination they are required to travel to.
Regiments of Keb 	Keb 	 	22 Regiments 	The Regiments of Keb are regularly stationed on the battle-moons of Keb, surrounding the Necron Sept of Keb who overran their world when they emerged from its core almost a hundred years ago. As their homeworld of Keb was originally a feudal world on the edge of known space they still maintain a very medieval outlook on life- the only thing that has changed for them are the weapons they use and the foes they face. Each of the 6 regiments of Keb are from one of the battle-moons of Keb and are under the leadership of nobles from the major families who rule of those moons.
Sons of Fenrir 	Veðrfölnir 	 	120,000,000 Soldiers 	The Sons of Fenrir is an Imperial Guardsman Regiment native to Veðrfölnir that is unique among the numerous regiments that are serving the God Emperor of Mankind in the defense of its people across the known galaxy.
Its home sector, Ygdrassil is composed of twenty-four planets fifteen of which is populated and located along the outermost reach of the Milky Way Galaxy (previously marked lost/ feral in Imperial Star Maps; Segmentum Ultima, outermost edge).
1st Somnium Battlegroup
("The Trashmen") 	Somnium 	 	1 Battlegroup
(~18 billion soldiers)	So what do you do with 18 billion armed, pissed, and starving gangers? The Imperium’s answer, unsurprisingly, was to blame their situation on someone else, arm them, and ship them off to fight it. This is exactly what happened to form the 1st Somnium Battlegroup aka the “Trashmen”.
Ubrin Regiments 	Ubris II 	 	115 Regiments 	Criminals form the Hive Cities of Ubris II. They form gang-regiments but fight with the Emperor's own wrath. They frequently use cybernetic augmentation and regularly employ abhumans.
14th Elpaqualindor Brigade (The Valorous Elpaqualindor Brigade)	Elpaqualindor	 	1 Brigade 	The 14th Elpaqualindor Brigade is from the high-peaked garden moon of Elpaqualindor where they train. The high altitudes and incredibly steep terrain means the soldiers who train there are well adapted to high altitude warfare. The Valorous Elpaqualindor Brigade specializes in mountainous assaults, HALO jumps/orbital insertion, and jump troops. They are famously stoic, silent, and smoke a particularly noxious kind of cigarette that is made from something in the nightshade family.
Yildirim Tribal Cavalry 	Yildirim 	Pict-file unavailable	~35,000 Soldiers 	The Yildirim Trival Cavalry refer to regiments mobilized from the Feudal World of Yildirim, a desert planet in Segmentum Ultima. Hailing from recently-rediscovered planet, the Tribal Cavalry were raised in the 41st Millennium and their numbers were greatly expanded for the Indomitus Crusade. They primarily ride camels and horses descended from Terran stock, which they had for millennia since their presumed arrival on Yildirim on colony vessels that lost all contact with humanity during the Age of Strife. Since joining the Imperium the Yildirim cavalrymen have proved their worth in multiple battles.
Note: Alphabetized by unit name, ignoring numbering.