The 2d Battalion of the 65th RCT, which arrived at Yonghung late that afternoon, had its baptism of fire within a few hours. Guerrillas in estimated strength of 500 to 800 attacked at 0300 on the 7th, inflicting casualties of six killed and 14 wounded. Troops of the 96th Field Artillery Battalion also came under attack, as did elements of the 4th Signal Battalion, USA. Company D of the 1st Tank Battalion sent a Marine tank and “Weasel” (M-29) to evacuate the wounded with the assistance of the Amtrac platoon guarding the empty train at Yonghung.[311] [311] G-3 _SAR_, 24; 1stTkBn _SAR_, 13. At 1400 that afternoon the empty train resumed its run to Wonsan. Only two miles had been covered when the locomotive and six cars were derailed by a split rail and wrecked just south of Yonghung. Personnel losses amounted to one man killed and 14 injured.[312] [312] The description of this fight at Yonghung is based upon: 1stAmphTracBn _SAR_, 5–6; 1stAmphTracBn HD, _Nov 50_, 3; Dolcater _3d Infantry Division in Korea_, 69; G-3 _SAR_, 24; X Corps _POR 42_; and _1stMarURpt (S-3) 9_; D/Tks tel to G-3 1stMarDiv, 0955 8 Nov 50. At almost exactly this same hour the fourth supply train was stopped south of Kowon by a blown section of track. The guard proceeded on foot to investigate and encountered the depressing spectacle of the third supply train, abandoned by the enemy after being plundered. One ammunition car was still burning and in another riddled car the bodies of the trapped Marines were found. So extensive was the damage to tracks and switches that rail service could not be resumed until 9 November.[313] [313] CO I Co [sic] 1stAmphTracBn tel to G-3 1stMarDiv, 2215 7 Nov 50; Smith, _Notes_, 475–478. The Corps commander summoned General Smith to Wonsan that morning for a conference on measures for the security of the rail line. It was decided that only daytime runs would be made thereafter, with the train guard increased from 38 to 50 men. The 65th RCT, the 26th ROK Regiment and a battery of the 96th Field Artillery Battalion were placed under the temporary control of the 1st Marine Division with a mission of guarding bridges and other key points.[314] [314] Smith, _Notes_, 475–478; CG’s Diary Extracts in X Corps _WD_ 7 Nov 50. General Smith worked out a plan for the ROK regiment to drive the guerrillas southward from the Chigyong area toward the 65th RCT at Yonghung. As it proved, elements of both units were given Corps commitments which prevented this maneuver from being put into effect. They remained only a few days under nominal Division control, being used for a variety of security missions along the Wonsan-Hamhung MSR.[315] [315] Smith, _Notes_, 475–478; CG X Corps msg X12270, 9 Nov 50.