During the Second World War, the brigade was the lowest formation within the military hierarchy, and consisted of multiple battalions, and were commanded by a brigadier. Generally, three infantry brigades would be used to form an infantry division, although brigades could be used an independent formations. In the latter case, they were usually assigned to a Corps-level command to be utilised. Brigades were flexible formations, and rarely maintained the same subunits. Likewise, brigades could be moved from division to division or corps-level commands, as the tactical or strategic need arose. Their role could also vary dramatically, from being a combat formation to becoming a training organisation. Over the course of the war, 216 uniquely numbered or named brigade formations were formed. How