The attack did not materialize, but on 17 May Army of the Republic of Vietnam (ARVN) forces tangled with VC from the 271st and 273rd Regiments west of An Lộc.

Seaman ordered BG DePuy to counter this new offensive and Operation El Paso II was launched on 2 June.

[1]: 312 On 8 June, Troop A 1/4th Cavalry comprising 9 M48 tanks and 32 other armored vehicles left Phu Loi Base Camp to move to An Lộc.

[1]: 312–3 On 9 June, the operation was expanded by the addition of Col Sidney Berry's 1st Brigade, 1st Infantry Division which was tasked with searching for the VC from Highway 13 west to Minh Thanh.

As the battle developed Company C 2/28th Infantry was deployed as reinforcements and following air and artillery strikes assaults were launched on the hills.

At 14:30 Company C and the battalion's reconnaissance platoon assaulted Hill 177 from the south and west but were pushed back by a VC counterattack.

[1]: 324 [2] This article incorporates public domain material from websites or documents of the United States Army Center of Military History.