The Spartans had a word, pseudoandreia, to describe all the shouting, weapon clashing and pump-up speeches the other side gave their guys before a battle. They thought it was a sign of nerves winning out over discipline.
The Spartans did the same thing at every battle. They sang a hymn to the goddess Artemis as they stood in ranks, then advanced to contact in silence. It didn't work every time, but nobody enjoyed facing it.