What are the four rest positions that can be given at the halt?

The four rest positions that can be given at the halt include Parade rest, Stand at ease, At ease, and Rest. This set of positions is essential in military drill and facilitates discipline and order, allowing soldiers to maintain a level of readiness while offering some relief from the standard Attention position.

"Parade rest" is a position that acknowledges a degree of relaxation while remaining alert and ready to respond. "Stand at ease" allows for a less formal posture but still requires attention. "At ease" permits soldiers to relax in posture while remaining attentive to their commanding officer. Lastly, "Rest" provides an even more relaxed stance, giving soldiers a brief respite without losing readiness.

In contrast, other options may introduce terms or positions that do not belong to the standard list of rest positions defined in military drill manuals, such as Order arms, which pertains to the carrying of arms, rather than a position of rest or relaxation.