occupying the left half of the US 3rd Infantry Division’s sector. Out of the ground between the Imjin and Chorwon, the III Army Group was to advance south on the Route 33 axis, its three armies attacking abreast in columns of divisions. Nearest the Imjin, the 15th Army had a narrow zone between the river and Route 33 projecting through the area occupied by the US 65th Infantry Regiment. Along Route 33 and east of it, the 12th Army and 60th Army at group center and left were to attack through ground held by the Philippine 10th Battalion Combat Team on the right flank of the US 3rd Infantry Division and through the Pogae-san ridges occupied by the Turkish Brigade and US 24th Infantry Regiment in the sector of the US 25th Infantry Division. On the left of the main effort, the IX Army Group was to advance southwest out of the Kumhwa area, guiding on Route 3. Sung Shih-lun, the group commander, set the 27th Army on his right for an attack astride Route 3. The 27th thus initially would be advancing in a zone centered on the boundary between the US 25th and 24th Infantry Divisions. Similarly, the 20th Army on the group's left would attack along the US I-IX Corps boundary through portions of the 24th Division and ROK 6th Division sectors. Peng's plan included auxiliary attacks along each flank of the main effort and another east of the Hwacheon Reservoir. In the west, KPA I Corps was to move southeast toward Seoul over Route 1 and through the ground between the road and the Han River, but its leading forces displacing forward from behind the Ryesong River would not reach the Imjin in time to participate in the opening attack on the ROK 1st Division. In the area adjacent to the Hwacheon Dam, the somewhat worn 39th and 40th Armies of the XIII Army Group were to assist with holding attacks on either side of Route 17 in the eastern portion of the ROK 6th Division's sector and the sector of the US 1st Marine Division. In what would be essentially a separate effort east of the Hwacheon Reservoir, KPA forces were to strike for Yanggu and Inje, where breakthroughs could open up Routes 29 and 24 leading southwestward to Chuncheon and Hongcheon. III Corps, whose 1st, 15th and 45th Divisions had been holding the entire