All Marine tactical squadrons were in action on 28 January for the first time since December. Nearly two-thirds of the flights from Bofu and K-9 were diverted from armed reconnaissance to troop support. A typical operation was carried out by four VMF-312 planes on their second day of duty at Bofu. After reporting to MELLOW they were directed to Mosquito Cobalt, which had received a message that enemy troops were hiding in a village just north of Suwon, occupied that day by the U.S. 35th infantry. Under the Mosquito’s direction they bombed, strafed, and napalmed some 40 buildings containing CCF soldiers.[60] [60] VMF-312 _HD_, Jan 51. The fall of Suwon opened the way to Inchon and Seoul as Chinese resistance stiffened. Eighth Army progress was anything but reckless, but Ridgway had served notice on the enemy that he held the initiative and intended to keep it. Operation ROUNDUP followed on the heels of THUNDERBOLT. Merely a change in name was involved, for the advance continued at the same prudent pace without any important amendments to the original mission. _Action in the Pohang-Andong Zone_ The Marines in the Pohang-Andong zone had their first brush with the elusive enemy on 22 January. A patrol of the 1st Battalion, 1st Marines, flushed out a guerrilla force near Mukkye-dong, several miles southeast of Andong (Map 5). Captain Robert P. Wray’s Charlie Company deployed for action at sunset and shots were exchanged. The Marines had no casualties and the enemy could not have suffered many losses before he disappeared into the winter dusk. Even at this early date the Korean Reds seemed to have lost confidence in their guerrilla operations. In a message dated 23 January taken from a prisoner, the commanding general of the II NKPA Corps directed General Lee Ban Nam to withdraw if possible. It read as follows: Get all of your troops out of the enemy encirclement and withdraw to north of Pyongchang without delay. Liaison team sent with radio. If you will inform us of your escape route we will assist by clearing your advance. If you cannot escape, stay in the rear of enemy as guerrillas.[61] [61] 1stMarDiv _PIR_ 116, Encl 1. By the 24th an enemy drift southeast from the zones of the 1st and 5th Marines to 7th Marines territory was apparent. The 1/7 command post and Company A received scattered mortar fire late that afternoon. Action picked up the next morning when dawn brought an attack by an estimated 100 guerrillas on the regimental command post. After a brisk 90-minute fire fight the Korean Reds withdrew to the east, leaving seven dead behind and taking with them an unknown number of wounded.