the.com/battle cry

A shout engineered to make your fear someone else's problem.

means A rallying shout raised before or during combat (or any fight, literal or figurative) to rouse courage and signal unified intent.

from A straightforward compound — 'battle' from Old French bataille, tracing back to Latin battuere meaning 'to beat or strike,' and 'cry' from Old French crier, itself from Latin quiritare, originally 'to wail' or 'raise a complaint.' No exotic backstory here: armies simply needed a word for the roar that precedes the clash, something to distinguish it from an ordinary shout. The phrase has long since marched off the battlefield into boardrooms and sports arenas, keeping its original job intact — turning private dread into shared noise.

origin trick
Loud unison yelling once raised real battlefield cortisol in enemies
modern use
Startups now chant slogans borrowed from literal war history
science bit
Shouting together synchronizes heart rates, boosting group courage fast
famous example
Remember the Alamo outlived the battle it mourned
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