What are the four types of commands in military drill?

The four types of commands in military drill consist of preparatory commands and commands of execution, which are essential for clear communication and effective maneuvering during formations and movements.

Preparatory commands alert the unit that a movement is about to happen, allowing them to prepare physically and mentally. This type of command sets the stage for the subsequent action. For example, when a leader calls "Attention," it signals the unit to prepare for a change in posture.

The command of execution follows, providing the signal for the unit to carry out the action. This is crucial, as it ensures that all members act simultaneously, contributing to the unity and precision of the movement. An example would be calling "March," at which point the unit begins to move.

The notion of combined commands and supplemental commands mentioned in other options doesn't align with standard military terminology. Instead, the focus is strictly on the two fundamental components—the preparatory and execution commands— which work together to facilitate effective drill movements.