Marching syllable

• One in a military march?
• One in the Army
• Driller's syllable
• March starter
• Preceder of "two, three, four"
• Cadence call
• Drill sergeant's bark
• Quarterback's call

Wiktionary Word definitions in Wiktionary
interj. The first beat of a 4/4 military cadence, commanding either the lead-off step in a march or some other action.

Wikipedia Word definitions in Wikipedia
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