As part of Operation El Paso, which took place from May to July 1966, the U.S. 1st Infantry Division deliberately exposed information about a planned resupply and engineer equipment convoy from Minh Than north to An Lộc. Division planners anticipated the enemy response would be an ambush at one of a number of possible locations. As a result, the supposedly lightly armed convoy actually consisted of armored cavalry and infantry. Additionally, 1st ID planners prepared for air assault operations at the most likely ambush sites. Events unfolded as the planners had foreseen, and the Viet Cong ambushed the convoy. The ambush sprang the 1st Infantry Division's trap, and the subsequent Battle of Minh Thanh Road resulted in 50 percent of the Viet Cong regiment becoming casualties.