Brigade

google

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mid 17th century: from French, from Italian brigata ‘company’, from brigare ‘contend’, from briga ‘strife’.

wiktionary

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Borrowed from French brigade.

etymonline

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brigade (n.)

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.