1. Raise the volume: Make sure that your voice can reach the ears of all soldiers.
2. Use a clear and powerful tone: the password needs to be clear so that soldiers can understand and act.
3. Command action: While shouting the password, you can cooperate with gestures or batons to help soldiers better understand and execute.
So, you can shout: "Forward!"
Note that this password is usually only used in the army, and it may cause confusion or misunderstanding if used in other occasions.