friendly troops; allied forces
Refers to military units on one's own side, as opposed to enemy forces. Used in military contexts.
We must hold out until the friendly troops arrive.
敵軍 means 'enemy forces', the opposite of 友軍部隊.
友軍 is a shorter synonym for 'friendly forces', while 友軍部隊 specifically refers to a unit or detachment.
Compound of 友軍 (friendly forces) and 部隊 (unit, corps).