Complex sentence: At the start of World War II, the SS Regiment were renamed in October 1939 the 1st SS Totenkopfstandarte "Oberbayern" as the 1st Panzer Grenadier Regiment, SS Totenkopf Division and was later renamed the 5th Panzer Grenadier regiment in 1943.
Split into simpler sentences: At the start of World War II, the SS Regiment was renamed in October 1939. The 1st SS Totenkopfstandarte "Oberbayern," as the 1st Panzer Grenadier Regiment SS Totenkopf Division and was later renamed the 5th Panzer Grenadier regiment in 1943.