Until 13 November, when the 7th Marines advanced toward Hagaru, patrols from Koto-ri repeatedly sighted bands of Chinese in the distance. Except for a fight on 11 November in which C Company claimed to have inflicted 40 casualties on the enemy and lost four killed and four wounded, there was little action. With a little pressure on the ground or from the air, the enemy vanished, and thus the uneasy calm continued.[295] [295] 7th Mar _SAR_, 15–16; CO 7thMar msg to CG 1stMarDiv, 1400 10 Nov 50; Litzenberg Comments, 19 Jul 56. [Illustration: AREA OF OPERATIONS 1st Marine Division October-December 1950 MAP-2 ] While the 7th Regiment had been fighting, marching, and climbing toward the Chosin Reservoir in early November, the 5th Marines peacefully combed the approaches to the Fusen Reservoir to the east. After detaching 1/5 to Division control on 4 November and stationing 3/5 near Oro-ri, Lieutenant Colonel Murray sent the 2d Battalion into the Sinhung Valley to relieve the 18th ROK Regiment. The relief took place at 1145 on the 4th, and Lieutenant Colonel Harold S. Roise deployed 2/5 around a valley junction five miles north and 15 miles east of the then embattled 7th Marines.[296] [296] 2/5 _SAR_, 10; CG 1stMarDiv msgs to CO 5thMar, 1605 and 2202 3 Nov 50; CG X Corps msg X 11939, 3 Nov 50; CO 5thMar msg to 2/5, 1/11, A/Engr, ATCo, 4.2″ MCo, 2100 3 Nov 50; 2/5 _HD_, _Nov 50_, 2. Roise’s mission was twofold: to block the Sinhung corridor while determining the strength and disposition of the enemy, if any; and to check certain northerly routes shown on maps as possibly leading to either the Fusen or Chosin Reservoirs, or both. Reconnaissance patrols in squad strength and combat patrols of reinforced platoons and company size fanned out in a broad arc during 5–9 November. They determined that no usable route led to either reservoir from the south, but that the highway continuing northeast from the town of Sinhung, leading to the 7th Infantry Division’s zone and the Manchurian border, would carry military traffic. From 7 November, Roise’s troops made daily contact with Army patrols coming down the highway, but no units tried to penetrate the apparent screen of enemy defenses close to the Fusen Reservoir.[297] [297] 2/5 _SAR_, 10. Major Merlin R. Olson, 1/5’s Executive Officer, led Companies A and B on 7 November in a reconnaissance in force to Huksu-ri, that annoying road junction west of Oro-ri. On the 8th Olson’s force had a running fight with North Koreans before being recalled while still short of his objective. Olson’s recall resulted from reports of 2000 North Koreans moving towards the MSR.[298] [298] CO 1/5 tel to G-3 1stMarDiv, 1820 8 Nov 50; “Special Reconnaissance of the 1st Bn 5thMar, 7–9 Nov 50,” 10 Nov 50.