The German 23rd Infantry Division was a military unit operational during World War II. It was organized along standard lines for a German infantry division. It was non-motorised and relied on horse-drawn wagons for its mobility. The unit carried the nickname Grenadierkopf. The 23rd Infantry participated in the Invasion of Poland in 1939 as part of the reserve component of the 4th Army. The division was commanded by Walter Graf von Brockdorff-Ahlefeldt and consisted of the 9th, 67th, and 68th infantry regiments.