Complex sentence: They have also served overseas, having been deployed to Saudi Arabia, and also to Somalia as part of a United Nations peacekeeping force in Somalia, some of the Piffer battalions participated in the Battle of Mogadishu in 1993.
Split into simpler sentences: They have also served overseas, having been deployed to Saudi Arabia, and also to Somalia as part of a United Nations peacekeeping force. In Somalia, some of the Piffer battalions participated in the Battle of Mogadishu in 1993.