Complex sentence: He married Hedwig von Grolman on 4 August 1920 and in 1926 he joined the 18th Cavalry regiment in Stuttgart and in 1 February 1928 joined the 15th Infantry Regiment in Kassel.
Split into simpler sentences: He married Hedwig von Grolman on 4 August 1920. In 1926 he joined the 18th Cavalry Regiment in Stuttgart, and in 1 February 1928 joined the 15th Infantry Regiment in Kassel.