The term COMBAT UNIT can be broken down into two parts: CORPS (5 letters) and TANK (4 letters). A CORPS is a large military unit, typically consisting of two or more divisions, and is usually commanded by a lieutenant general. A TANK is an armored fighting vehicle designed for front-line combat, with heavy firepower, strong armor, and tracks providing good battlefield maneuverability. Together, a CORPS and a TANK form a combat unit, which is a military formation that is organized for combat operations.