Apache silent kill technique & camouflage level; The highest caliber still used by Special Forces troops, and Marines in the military today. (bye, bye sleeper cell's)

Colonising troops would send in whole regimens on horseback, thousands at a time, into apache camps. There they would find only elderly people and children. The Apache men would be gone raiding the troops camp. The women would be left behind in hiding to catch the troops off guard and slit their throats and kill every last one of them. Then they would send every horse back without riders (thousands). And completely demoralize the enemy. The Apache were the only tribe that was never defeated.