Complex sentence: The fighting had taken its toll on the division however, with the 15th Panzer and 21st Panzer only able to field 44 tanks between them, and four-fifths of the transport vehicles having been captured when they crossed into Egypt.
Split into simpler sentences: The fighting had taken its toll on the division, with the 15th Panzer and 21st Panzer only able to field 44 tanks between them. Four-fifths of their transport vehicles having been captured when they crossed into Egypt.