 In May 1952, the 20th Philippine Battalion Combat Team, under the command of Colonel Querobin, engaged the PVA forces at the town of Karhwagol, west of Chorwon; they were also involved in other major battles and assaults against the Chinese forces.There were numerous closely fought battles on Hill Eerie, as well as on Hills 18, 200, and 19, ('Yoke', 'Uncle' and Old Baldy), all in the T-Bone Hill area, but later the 20th were committed to the Beef Steak Hill area and the Alligator Jaws ().A series of raids were launched by the Filipinos, from 18 May, led by Lieutenant Rodolfo Maestro, killing 28 PVA and a further 23 the next day, before disengaging with the PVA while tanks and artillery continued to bombard the outpost.