The 5th Marines and KMCs had no opposition as they continued their withdrawal. Marine air reduced to a minimum the harassing efforts of the Chinese following the 1st Marines. As front-line units disengaged and fell back, the length of the main line of resistance was contracted enough for the 7th Marines to be assigned a reserve role. The 1st and 2d Battalions were given the responsibility for the defense of Chunchon as well as the crossing sites over the Pukhan and Soyang Rivers. Major Roach had reached the outskirts of Chunchon when 3/7 was ordered back across the Chunchon, to be attached to the 1st Marines on the left flank.[183] [183] 7thMar _HD_, Apr 51. Throughout the night of 24–25 April the enemy probed the Marine lines, seeking in vain a weak spot where a penetration could be made. It was already evident that the breakthrough in this area had given the Communists only a short-lived advantage. By the third night they were definitely stopped. Only minor patrol actions resulted except for two attacks in company strength on 2/1 at 0050 and 0150. Both were repulsed with total CCF losses of 25 counted dead. Contrary to the usual rule, the Marines saw more action during the daylight hours. A company-size patrol from 1/1 became heavily engaged at 1350 and three Company A tanks moved up in support. The fight lasted until 1645, when the enemy broke off action and the tanks evacuated 18 wounded Marines. Early in the afternoon a 3/1 patrol had advanced only 200 yards along a ridgeline when it was compelled to withdraw after running into concentrated mortar and machine gun fire. Sporadic mortar rounds continued until a direct hit was scored on the battalion CP, wounding Colonel McAlister, Lieutenant Colonel Banning, Major Reginald R. Myers, the executive officer, and Major Joseph D. Trompeter, the S-3. Banning and Myers were evacuated and Trompeter assumed command of 3/1. Losses of 18 KIA and 82 WIA for 24–25 April brought the casualties of the 1st Marines to nearly 300 during the past 48 hours.[184] [184] 1stMar _HD_, Apr 51. A simple ceremony was held at the 1st Marine Division CP on the afternoon of the 24th for the relief of General Smith by Major General Gerald C. Thomas. The new commanding general, a native of Missouri, was educated at Illinois Wesleyan University and enlisted in the Marine Corps in May 1917 at the age of 23. Awarded the Silver Star for bravery at Belleau Wood and Soissons, he was commissioned just before the Meuse-Argonne offensive, in which he was wounded.