The Bangladesh Infantry Regiment (BIR) is an infantry regiment of the Bangladesh Army. It was raised in 2001 as the second infantry regiment after the East Bengal Regiment. The regiment was raised initially by renaming some battalions of the East Bengal Regiment, before its own recruits were trained. This was the first new regiment raised by the Bangladesh Army in the 21st century, and consequently is also known as the Regiment of the Millennium.
Its stated role is to seek out, close with and destroy the enemy, within a traditional infantry combat scenario, however, the regiment also provides aid to the civilian government when called upon and also contributes regularly to Bangladesh's peacekeeping commitments overseas. The regiment deployed eight battalions to Bangladesh's UN peacekeeping commitments:
This is the list of the units of the Bangladesh Infantry Regiment.