When transitioning a unit into an extended rectangular formation, which command is given?

The command "Extend to the Left, March" is appropriate for transitioning a unit into an extended rectangular formation. This command instructs the unit to expand its formation laterally while maintaining proper alignment and spacing. The term "extend" denotes the action of widening the ranks, which is essential when preparing a unit for a more spread-out formation, such as an extended rectangular shape.

In this context, the command clearly communicates the action required, ensuring that all personnel involved understand to move in a coordinated manner to achieve the desired formation without confusion. This is particularly important in military drill and formations, where precision and clarity of command are crucial for maintaining discipline and organization within the ranks.

The other commands, while useful in different contexts, do not serve the purpose of establishing an extended rectangular formation. They either don't specify the necessary extension of the ranks or pertain to entirely different actions.