Rout
A rout is a chaotic and disorderly retreat or withdrawal of troops from a battlefield, resulting in the victory of the opposing party, or following defeat, a collapse of discipline, or poor morale.
A routed army often disintegrates into a state of "every man for himself" or sauve qui peut as the survivors flee for safety. A rout often results in much higher casualties for the retreating force than an orderly withdrawal. On many occasions, more soldiers are killed in the rout than in the actual battle. Normally, though not always, routs either end a battle or provide the moment the winner needs to win decisively a battle (or even campaign).