Spanish term (edited): dispersaba la resistencia

"A rout is commonly defined as 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 degenerates into a sense of "every man for himself" as the surviving combatants attempt to flee to safety. A disorganized 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 effectively end a battle, or provide the decisive victory the winner needs to gain the momentum with which to end a battle (or even campaign) in their favor. The opposite of a rout is a rally, in which a military unit that has been giving way and is on the verge of being routed suddenly gathers itself and turns back to the offensive."
http://en.wikipedia.org/wiki/Rout