This manual provides a doctrinal framework for the Bradley Fighting Vehicle (BFV) equipped Infantry rifle platoon and squads. It addresses the BFV and all variations, rifle platoon and squad combat and noncombat operations, across the spectrum of conflict. Content discussions include principles, tactics, techniques, procedures, terms, and symbols that apply to small unit operations in the operational environment. This manual is not intended to be a stand-alone publication and is intentionally designed as a companion manual to FM 3-21.8, The Infantry Rifle Platoon and Squad. Many of the subjects covered in FM 3-21.8 are not only mutually applicable to the mechanized platoon and squads but also are nearly identical and need not be republished. Because of this, ATTP 3-21.71 focuses on the unique characteristics and capabilities of the mechanized platoon and squads.