Final answer:
In military drill commands, the 'Executive Command' is the part that tells troops to execute the movement.
Step-by-step explanation:
In military drill commands, the part that tells troops to do or execute the movement is known as the Executive Command. Drill commands typically consist of two parts: the preparatory command and the executive command. The preparatory command states what movement will be done, and the executive command signals when the movement is to be carried out. For example, in the command 'Forward, march', 'Forward' is the preparatory command and 'march' is the executive command which indicates the actual execution of the movement.