brigade (n.) Look up brigade at Dictionary.com
subdivision of an army, 1630s, from French brigade "body of soldiers" (14c.), from Italian brigata "troop, crowd, gang," from brigare "to brawl, fight," from briga "strife, quarrel," perhaps of Celtic (compare Gaelic brigh, Welsh bri "power"), from PIE root *gwere- (1) "heavy." Or perhaps from Germanic.