March syllable

• Drill instructor's syllable
• Start of a drill sergeant's count
• Drill sergeant's "one"
• Preceder of "two, three, four"
• One in the Army
• "___, two, three, four..."
• Marching cadence start
• Cadence call

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
hep \hep\ (h[e^]p), interj. A call used by drill instructors to count cadence during marching; used identically to hut and hup .

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.