Soldiers march to the call of "hup".
An example of hup is what an Army drill instructor says to call the marching rhythm for his soldiers.
Origin of hupprobably alternative of one
- The first beat of a 4/4 military cadence, commanding either the lead-off step in a march or some other action.
- After four we raise our swords...One Two Three Four...Hup Two Three Four...Hup Two Three Four.