Simplify the following text for a Grade 10 native English-speaking person.
Original: They were then replaced by the 4th Armored Division in 1957 , which was redesignated as the 1st Armored Division in 1971 and moved to Hindenburg Kaserne in Ansbach in 1972 .
Simplified: They were then replaced by the 4th Armored Division in 1957 , which was renamed as the 1st Armored Division in 1971 and moved to Hindenburg Kaserne in Ansbach in 1972 .