During the night approximately 2,500 rounds of CCF artillery and mortar fire lashed the positions. Korean Marines, aided by friendly artillery, repelled the assault and inflicted heavy casualties on the enemy. Supporting fires included more than 1,200 rounds of HE shells from the KMC 4.2-inch Mortar Company. Chinese casualties were listed as 295 known killed, 461 estimated wounded, and 9 POWs. Korean Marine losses were 50 killed, 86 wounded, and 18 missing.[301] By first light the Korean outposts had thrown back the enemy’s latest well-coordinated attack. This ended the last significant action of October in the 1st Marine Division sector. [301] _Ibid._ _Six Months on the UNC Line_[302] [302] Unless otherwise noted, the material in this section is derived from: Barclay, _Commonwealth_; Cagle and Manson, _Sea War, Korea_; Clark, _Danube to Yalu_; Field, _NavOps, Korea_; Futrell, _USAF, Korea_; Walter G. Hermes, _Truce Tent and Fighting Front--United States Army in the Korean War_ (Washington: OCMH, DA, 1966), hereafter Hermes, _Truce Tent_; Miller, Carroll, and Tackley, _Korea, 1951–1953_. The KMC Regiment’s battle in late October marked the end of two months of heavy fighting in the division sector. October had witnessed the most intense combat in more than a year. As the third Korean winter approached outpost clashes and small unit actions along the rest of the UNC frontline began to slacken. During November and December, neither side appeared eager to pursue the offensive. Chinese aggressiveness declined noticeably. Despite other action initiated by the enemy, the I Corps sector remained the chief Communist target. On 19 November, the British 1st Commonwealth Division successfully withstood what was initially a company-size attempt to capture the Hook. In sharp fighting between 1900 and 0430, Black Watch and reinforcing Canadian units repulsed a determined battalion-strength CCF assault, killing more than 100 Chinese.[303] Marine and I Corps artillery units fired almost continuously throughout the night in support of the Hook defenders. Fighting flared again, briefly, in December in the I Corps sector when Chinese soldiers attempted to overrun outposts on the Imjin River line, but were thrown back by the ROK 1st Division. The enemy then tried to seize key terrain forward of the U.S. 2nd Division, but was again halted. [303] For details of this action see Canadian Department of National Defence ltr to Dir, MCHist, HQMC, dtd 8 Jan 70 in v. V, Korean comment file.