The NLA vanguard brigade fought its way through Hassanits way through Hassanabad Pass at about 1 am and arrived at the plain leading to Charzebar Pass. From the opposite direction a well equipped column from the 27th Mohammad division commanded by Baba'i was moving from the pass towards Hassanabad. Fighting again broke out. This time, the enemy was pounded by tanks and other heavy weaponry and retreated toward Charzebar Pass.
Under cover of night, the enemy laid various ambushes which were destroyed one after the other. Despite reinforcements, Khomeini's forces suffered heavy casualties and failed to halt the NLA's progress. They ultimately retreated to Charzebar Pass, which was under their own control. From atop the peaks leading into the pass, the enemy opened fire.
At 2 am, Tuesday, Kossari, commander of the 27th Mohammad division, was still in the south with the majority of his forces. Bahonar garrison, which lodged part of the division in Kermanshah's Mahidasht region, informed Kossari by wireless that the Mojahedin had arrived and he must get there with his forces as soon as possible. At first, Kossari refused to believe the news, saying it was impossible; if it were so, he would have been informed from Tehran, etc.
At this point, the forces of the National Liberation Army were 35 kilometers from Kermanshah. From Islamabad to Charzebar, Khomeini's forces suffered at least 400 casualties.
\