Which of the following movements in marching requires a 15-inch step?

The half step in marching is characterized by a 15-inch step. This specific movement is crucial as it allows for precise control and positioning while maintaining formation, especially during maneuvers that require Soldiers to adapt to evolving scenarios or when changing directions with finesse. The 15-inch step at half step ensures that Soldiers can effectively manage distance between themselves and maintain alignment with their fellow team members. This movement is particularly important in military formations where discipline and coordination are paramount, allowing units to execute movements efficiently without disrupting their formations.

Other movements, such as column left or right face, do not utilize the 15-inch step as their defining characteristic, and quick time refers to a faster stepping pace (usually 30 inches), which further differentiates it from half step.