Final answer:
A drill command is an oral order issued by a military leader or designated person on the drill field, essential for discipline and unit cohesion. The command's effectiveness is vital for maintaining order, reflecting the military hierarchy where the President is the highest authority.
Step-by-step explanation:
The order issued orally in the drill field by a leader, commander, or any person assigned to give the command is known as a drill command. Drill commands are crucial for maintaining discipline and order within a military unit and are part of the fundamental training that soldiers undergo. They require clear, concise, and audible communication to ensure that the unit functions as a cohesive entity. The effectiveness of a command can directly influence the discipline and orderliness of a military force, as implied in the various excerpts that discuss the importance of commands and their enforcement. A commander's authority to issue commands is a significant aspect of military hierarchy and structure. Within the United States, for instance, the President is designated as the Commander in Chief, giving them the highest level of command authority over the military forces, while on the drill field, this role is taken by the designated drill instructor or leader.