How many brigades are in the U.S. Army?
Brigade combat team
The infantry brigade combat team, as of 2014, contains 4,413 soldiers and is organized around three battalions of infantry. Each type of brigade (light infantry, air assault, or airborne) has the same basic organization. Each infantry brigade is capable of air assault operations, whether or not it is officially designated as an air assault brigade. Also, most units typically maneuver in HMMWVs when deployed and operate as "motorized infantry" to facilitate speed of movement.
Legion of the United States
The legion was composed of four sub-legions, each commanded by a lieutenant colonel. These sub-legions were self-contained units with two battalions of infantry, a rifle battalion (light infantry skirmishers armed with Pennsylvania long rifles to screen the infantry), a troop of dragoons and a battery of artillery. With their combined arms organization, the sub-legions can be seen as forerunners of today's brigade combat teams.