Kansas Line. He instructed the 24th and 25th Divisions to begin their withdrawals at 08:00 but directed the ROK 1st Division and 3rd Division not to withdraw until the surrounded Gloster battalion had been extricated. He specifically instructed General Soule to get the Glosters out before withdrawing, "even if you have to counterattack." Kapyong (22–25 April) In the Kapyong sector, the offensive saw the 27th British Commonwealth Brigade establish blocking positions in the Kapyong Valley, also one of the key routes south to the capital, Seoul. The two forward battalions—3rd Battalion, Royal Australian Regiment (3 RAR) and 2nd Battalion, Princess Patricia's Canadian Light Infantry (2 PPCLI)—occupied positions astride the valley and hastily developed defences on 23 April. As thousands of ROK soldiers began to withdraw through the valley, the PVA infiltrated the brigade position under the cover of darkness, and assaulted the 3 RAR on Hill 504 during the evening and into the following day. Although heavily outnumbered, the 27th Brigade held their positions into the afternoon before the 3 RAR withdrew to positions in the rear of the brigade on the evening of 24 April, with both sides having suffered heavy casualties. The PVA then turned their attention to the 2 PPCLI on Hill 677, but during a fierce night battle they were unable to dislodge them and sustained enormous casualties. The fighting helped blunt the PVA offensive and the actions of the 2 PPCLI and the 3 RAR at Kapyong were important in helping to prevent a breakthrough on the United Nations Command central front, and ultimately the capture of Seoul. The two battalions bore the brunt of the assault and stopped an entire PVA division during the hard-fought defensive battle. The next day the PVA withdrew back up the valley to their north, in order to regroup for the second impulse of the offensive. Withdrawal to the Delta Line (25 April) With the Yongp’yong River at its back, the US 25th Infantry Division faced a canalized withdrawal over two bridges in the southeastern corner of its sector, one on Route 3, the other at Yongp’yong town to the west. Earlier, after the PVA had captured Hill 664 directly north of the Route 3 crossing, General Bradley had set the 3rd Battalion, 27th Infantry, in a blocking position above the bridge. For the withdrawal he ordered all of the 27th Infantry to cover both river crossings while first