Trumpet,
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A highly mobile army unit using vehicular transport, such as light armor and helicopters. 2. Troops trained to fight on horseback. [French cavalerie, from Italian cavalleria, from cavaliere, cavalier, from Old Italian; see cavalier.]
What does Calvary mean in the military?
Definition of cavalry
1a : an army component mounted on horseback. b : an army component moving in motor vehicles or helicopters and assigned to combat missions that require great mobility.