On 4 August 1914, Hans-Ulrich Back joined the army as a volunteer Fahnenjunker. On 19 October he was appointed Fahnenjunker in the 1st Hanover Infantry Regiment No. 74 of the Imperial Army. On 30 July 1915, he was promoted to Lieutenant. He went to the front with this regiment where he saw much combat and was injured many times in the next three years of the war. For his injuries he was awarded the Imperial Army's Silver Wound Badge. He was given many other awards, including two Iron Crosses, for his other achievements during the war.
Interwar period
Immediately after the war he was transferred to the Freikorps in the Reichswehr. Soon he was used in the transition army in the spring of 1920 at the Reichswehr Infantry Regiment 19 where, on 30 June 1920, he was discharged from active duty. He was awarded the rank of first lieutenant before being discharged. Shortly after his discharge from the now shrunken German army, he transferred to the police, where, on 20 June 1921, he was promoted to lieutenant colonel. On 30 June 1926 he was promoted again to captain of the police. In the autumn of 1935 he made the change back to the Wehrmacht, which was again being expanded. He joined the 60th Infantry Regiment where, on 1 January 1936, he was promoted to major. On 12 October 1937, he was transferred to the Cavalry Rifle Regiment 4. The following year, on 1 February 1938, he was appointed commander of the 1st Battalion of the Rifle Regiment 2. Exactly one year later, on 1 February 1939, he was promoted to lieutenant colonel, and was commissioned to the leadership of the Rifle Regiment 2 within Panzer Division 2. This is where he would remain until the start of World War II.
World War II
During the Polish campaign, Back was awarded the braces for his Iron Crosses. He then returned to the 1st Battalion, of which he had been commander the year before. In the spring of 1940 he led the 1st Battalion through Belgium and France in the western campaign, and received the Knight's Cross of the Iron Cross in August, days later being reassigned to the 304 Rifle Regiment. He won the previous Iron Cross for the capture of the Somme Bridge in France. Now at the 304th Rifle Regiment, he took part in the Balkan campaign and contributed to the invasion of Southern Russia, was redeployed to Central Russia, and was promoted to full colonel by 1 January 1942. He was reassigned that same year and saw many appointments including the 11th Panzer Greanadier Brigade, Commander of the Rapid Troops XVII, 16th Panzer Division, commander of the Panzertruppen X, 178th Panzer Division and the 232nd Panzer Division, where he had since been promoted to major general. On 28 March 1945, he was severely wounded on the Raab river in Hungary. His recovery time surpassed his time in arrest by occupational forces.
Awards and decorations
Knight's Cross of the Iron Cross on 5 August 1940 as Oberstleutnant and commander of I./Schützen-Regiment 2
