Which command would you use to initiate a movement in drill?

To initiate a movement in drill, the command "Forward march" is utilized. This command instructs personnel to begin moving forward in a synchronized manner, which is a core aspect of drill movements. It's the command that signals troops to transition from a stationary position to marching, setting the pace for the unit and ensuring everyone moves cohesively.

In a drill context, other commands serve different purposes. "Attention" positions troops in a formal stance but does not commence movement. "Halt" is used to stop those who are marching and bring them to a standstill. "Fall out" instructs soldiers to exit formation, typically for a break or for individuals to take care of personal business, which means it does not initiate any kind of forward movement. Instead, it allows for liberty from drill procedures. Thus, "Forward march" is the unequivocal command for starting movement during drill exercises.