Question: Which Infantry Division from world war 2, had a twenty year old lieutenant?
Context: The 99th Infantry Division was a unit of the United States Army in World War II.  It played a strategic role in the Battle of the Bulge when its inexperienced troops held fast on the northern shoulder of the German advance, refusing them access to the vital northern road network that led into Belgium. Lyle Joseph Bouck, Jr. (December 17, 1923 – December 2, 2016) enlisted in the U.S. National Guard at age 14.  During World War II, he was a 20-year-old lieutenant in charge of the Intelligence and Reconnaissance Platoon, 394th Infantry Regiment, 99th Infantry Division.  On the first morning of the Germans' advance during the Battle of the Bulge, his 18-man unit along with four forward artillery observers held off an entire German battalion of more than 500 men for nearly an entire day, killing or wounding 92, and significantly delayed the German advance in a vital sector of the northern front.  Every single member of the platoon was later decorated, making it one of the most decorated platoons in all of World War II.  Bouck was one of the youngest commissioned officers in the U.S. Army. The 52nd (Lowland) Infantry Division was an infantry division of the British Army that was originally formed as the Lowland Division, in 1908 as part of the Territorial Force.  It later became the 52nd (Lowland) Division in 1915.  The 52nd (Lowland) Division fought in the First World War before being disbanded, with the rest of the Territorial Force, in 1920.  The Territorial Force was later reformed as the Territorial Army and the division was again raised, during the inter-war years, as the 52nd (Lowland) Infantry Division - a 1st Line Territorial Army Infantry Division - and went on to serve during the Second World War.  After the war, the division was merged with the 51st (Highland) Infantry Division in 1948.  The history of the division was carried on by the 52nd Lowland Brigade, and later the 52nd Lowland Regiment. The 70th Infantry Division was an infantry division of the British Army that fought during the Western Desert Campaign of the Second World War.  What would become the 70th Division originated with the 7th Infantry Division, which was formed in 1938 to serve in the British Mandate of Palestine during the Arab Revolt.  This division then transferred to Egypt on the outbreak of the Second World War and soon became the 6th Infantry Division, which went on to take part in the Battle of Crete and the Syria–Lebanon Campaign.  On 10 October 1941, the 6th Division was re-created as the 70th Infantry Division, in an attempt to deceive Axis intelligence concerning the strength of the British military in the Middle East. The 5th Indian Infantry Brigade was an infantry brigade formation of the Indian Army during World War II.  It was converted from the 9th Indian Infantry Brigade in September 1939, and assigned to the 4th Indian Infantry Division.  The brigade first moved to Egypt and took part in the early battles in North Africa.  Then in 1941, it moved to the Sudan with the 5th Indian Infantry Division.  Returning to 4th Indian Division command it took part in the Syria-Lebanon Campaign.  The brigade then returned to North Africa coming under command of the 5th and 10th Indian Infantry Divisions, and the 50th (Northumbrian) Infantry Division and the 51st (Highland) Infantry Division in the Campaign in Tunisia.  The brigade once more returned to the 4th Division for the Italian Campaign and the Greek Civil War. The 37th Field Artillery Regiment is a field artillery regiment of the United States Army, and parent regiment under the U.S. Army Regimental System.  The regiment was first constituted 5 July 1918 in the National Army.  The regiment served with the 10th Division during World War I, and the 2nd Infantry Division during World War II.  Elements of the regiment have served with the 2nd Infantry Division, 6th Infantry Division, 79th Infantry Division, and 172nd Infantry Brigade, among other units.  Two battalions of the regiment are currently active, the 1st Battalion, 37th Field Artillery is the direct support cannon battalion, in support of the 1st Stryker Brigade Combat Team, 2nd Infantry Division and the 6th Battalion, 37th Field Artillery is a Multiple Launch Rocket System battalion in the 210th Field Artillery Brigade. The 39th Infantry Division (Delta Division) was an infantry formation of the Army National Guard, originally formed as the 18th Division in 1917.  The division consisted of troops from Arkansas, Louisiana, and Mississippi.  After training at Camp Beauregard, Louisiana, the division was deployed to France but did not see combat before the end of World War I.  In July 1923 the division was re-designated as the 31st Infantry Division.  The 39th Infantry Division was reactivated after World War II with troops from Louisiana and Arkansas and its headquarters in Louisiana.  In 1967, the 39th Infantry Division was reorganized to become the 39th Infantry Brigade (Separate).  Its headquarters was in Little Rock, Arkansas and the unit consisted entirely of troops from the Arkansas Army National Guard. The 52nd Infantry Division ("52.Infanterie-Division") was a division of the Imperial German Army during World War I.  The division was formed on March 6, 1915, from units taken from other divisions or newly raised.  The division was initially mixed, with two infantry regiments from the Grand Duchy of Baden, one infantry regiment from Prussian Saxony, and Prussian and Baden support units (cavalry, artillery, engineers, and service and support units).  While the infantry regiments and the divisional cavalry squadron were regular army units, the rest of the division was made up of reserve units and units formed during the war.  The 66th Magdeburg Infantry Regiment was taken from the 7th Infantry Division, and the 169th and 170th Infantry Regiments were taken from Baden's 29th Infantry Division.  The 52nd Infantry Division became more Baden as the war progressed, as the 66th Magdeburg Infantry Regiment, the regiment from Prussian Saxony, was replaced on April 6, 1917, by Baden's 111th Infantry Regiment "Margrave Ludwig Wilhelm". The 9th Indian Infantry Brigade was an infantry brigade formation of the Indian Army during World War II.  Before the war the 9th (Jhansi) Infantry Brigade was a peacetime formation in Meerut district.  This brigade was redesignated the 5th Indian Infantry Brigade and a new 9th Brigade was then formed all in September 1939.  The new brigade was assigned to the 5th Indian Infantry Division in June 1940 to January 1944.  It then spent February attached to the 7th Indian Infantry Division before returning to the 5th Division.  The brigade spent two other short periods away from the 5th Division it was attached to the 17th Indian Infantry Division between March and April 1945 and was with the 19th Indian Infantry Division in April 1945, and returned to the 5th for the rest of the war. The 48th Infantry Brigade, was raised as the 48 Indian Infantry Brigade, in October 1941, at Secunderabad, India.  After an initial tenure with 19th Indian Infantry Division, it was transferred to the 17th Indian Infantry Division.  In World War II it participated in the Burma campaign and in April 1942 was attached to 1st Burma Division.  After the war the brigade returned to India as an independent brigade, and was located at Dhond in August 1947.  After India gained Independence in 1947, 48 Indian Infantry Brigade was re-designated as 48 Infantry Brigade.  Since then 48 infantry brigade has seen action Goa in 1961, as part of 17 Infantry Division; in the 1962 War in Kameng Frontier Division, Arunachal Pradesh, as part of 4th Infantry Division; and in the 1971 war, as part of 7th Infantry Division.  Since the 1970s, 48 Infantry Brigade has been located in Ferozpur, Punjab, as part of 7 Infantry Division.
Answer: 99th Infantry Division