Countermarching

Gaining ground (a.k.a., Macedonian)

Command:
"File Leaders, face about to the left/right, the rest pass through to the left/right and place yourselves behind your leaders."

File leader faces about, but does not step to one side or the other. The rest pass through to the left (or right - but all to the same side) and place themselves behind the leader.

This countermarch, Colonel Barriffe mentions: "... is rather remembered for its antiquity than excellency..."