Original sentence: At the Battle of Dien Bien Phu, Major Marcel Bigeard, commander of the French 6th Colonial Parachute Battalion (6th BPC), used infiltration tactics in an attempt to defend the besieged garrison against the Viet Minh trench warfare tactics
Edited sentence: At the Battle of Dien Bien Phu, Major Marcel Bigeard (who had no formal military training), commander of the French 6th Colonial Parachute Battalion (6th BPC), unwittingly re-invented infiltration tactics, in an attempt to defend the besieged garrison against the Viet Minh trench warfare tactics