Which of the following commands is NOT associated with marching?

The command "Back to One" is not associated with marching because it primarily refers to a position or formation change rather than a specific marching maneuver. This command is typically used in contexts like returning to a specific position or formation after a movement rather than directing the soldiers in how to march.

In contrast, commands like "Quick Time," "Mark Time," and "Right Shoulder Arms" are all distinctive commands relating to marching. "Quick Time" instructs soldiers to march at a standard pace, "Mark Time" directs them to march in place without moving forward, and "Right Shoulder Arms" involves the positioning of the weapon while at the march. These types of commands are integral to maintaining formation and executing maneuvers while moving as a unit.