ETYM French brigade, from Italian brigata troop, crew, brigade, originally, a contending troop, from briga trouble, quarrel. Related to Brigand.
A group of people organized for special activity.
Army unit smaller than a division.
1 A large body of troops.
2 A tactical and administrative unit composed of a headquarters, one or more units of infantry or armor, and supporting units.
Military formation consisting of a minimum of two battalions, but more usually three or more, as well as supporting arms. There are typically about 5,000 soldiers in a brigade, which is commanded by a brigadier general. Two or more brigades form a division.
An infantry brigade is one that contains more infantry than armor; it is said to be “infantry-heavy”. A typical armored brigade (“armor-heavy”) consists of two armored battalions and one infantry battalion supported by an artillery battalion and a field-engineer battalion as well as other logistic support.

1. To form a brigade.
2. To form or unite into a brigade.