Its precarious position, however, demanded either an investment of more outpost troops to retain possession of it or else its abandonment, in conjunction with other measures to neutralize loss of the position. At 1804 that day the latter course was instituted. The 7th Marines reported that the enemy had suffered an estimated 200 KIA and unknown WIA as a result of the bitterly contested outpost attacks on 6–7 October. Marine casualties were listed as 10 killed, 22 missing, 105 wounded and evacuated, and 23 not-seriously wounded. In all, during the first week in October, the 1st Marine Division gave up six outposts, or forward positions, that had been sited on some of the commanding ground in the Marine area. On the division left, COPs 37, 36, and 86 were the ones most removed from the Korean MLR and thus easily susceptible to being overrun by the enemy at will and to his early reinforcement.[231] The division theorized that near winter and the subsequent freezing of the Sachon would facilitate the movement of Chinese troops and supplies across the river to new positions. The enemy was now able to operate patrols east of the river without interference. At the opposite side of the division MLR, on its right flank, Detroit, Frisco, and Seattle had been lost. By gaining this string of outposts, the enemy was better able to exert pressure against other Marine positions forward of the line and the critical ground on JAMESTOWN. [231] FMFPac, _1stMarDiv Sum, Jul-Oct 52_. To counter this threat, General Pollock strengthened the outposts close to the MLR and increased his patrolling requirements. It was decided that in some cases the mission of the COP--that of providing early warning of impending attack and slowing it down--could be accomplished as effectively by using patrols and listening posts at night. By these activities, the Marines hoped to minimize the Chinese gains and prevent the launching of new attacks against either division COPs or JAMESTOWN. The serious situation on the outposts was compounded by existing political considerations, which prevented the Marines from initiating any real offensive campaigns. Moreover, any hill taken was invariably backed up by a still higher one, controlled by the enemy. The key factor was not so much holding an individual outpost as it was to insure that the enemy was unable to penetrate the JAMESTOWN line. _More_ PRESSURE, _More CAS, More Accomplishments_[232] [232] Unless otherwise noted, the material in this section is derived from: _PacFlt EvalRpt_ No. 5, Chap. 9; 1st MAW ComdDs, Jun-Oct 52; MAG-12 ComdDs, Jun, Sep 52; MAG-33 ComdD, Aug 52; MACG-2 ComdD, Sep 52; VMA-312 ComdDs, Sep-Oct 52; VMA-323 ComdDs, Jun-Jul, Sep 52; VMF(N)-513 ComdDs, Jun-Jul 52; VMJ-1 ComdD, Jul 52; Cagle and Manson, _Sea War, Korea_; Clark, _Danube to Yalu_; Field, _NavOps, Korea_; Futrell, _USAF, Korea_; Rees, _Korea_.