What position is the unit guidon in once a preparatory command is given?

When a preparatory command is given, the unit guidon is held in a raised vertical position. This position signifies readiness and command authority. The act of raising the guidon serves as a visual cue that indicates the unit is preparing to execute a movement or an order.

Holding the guidon in a raised vertical position not only demonstrates discipline and organization within the unit but also makes it easier for members to identify the leader's intent and the alignment of the unit. This practice is an essential aspect of military drill and ceremony, as it ensures that all members of the unit are synchronized and aware of upcoming commands.

In contrast, the other positions—flat on the ground, at ease position, or laying down—are not appropriate for maintaining the guidon when preparing to execute a command, as they do not convey the necessary readiness or command presence.