10–11 December Major General Murray-Lyon—realising that the positions at Jitra were still not ready—ordered Brigadier K. A. Garrett to take the 1/14th Punjab and the 2/
1st Gurkha Rifles to positions on the Trunk Road north of Jitra, in an attempt to delay the Japanese advance until 12 December. Garrett placed the 1/14th Punjab (Lt.Col. James Fitzpatrick) at Changlun, from the Thai border and the 2/1st Gurkhas (Lt.Col. Jack Fulton) at the village of Asun (
Kampung Asun) just a few miles north of Jitra. It was early morning on 11 December before the Japanese caught up with the 1/14th Punjabs at their next ambush position. In full daylight, Saeki's men were able to send a flanking party around the Punjabs' position forcing them to withdraw before they were cut off. The Japanese rapidly drove through the destroyed battalion and headed toward Asun. Fitzpatrick—a couple of miles down the Trunk Road—learned of the disaster from the few survivors racing toward Asun. Fitzpatrick and the few men with him attempted to build a roadblock but he was severely wounded when the Japanese tanks reached him. Garrett gathered the 270-odd survivors and escaped south. By early evening on 11 December, Saeki's column had reached the Gurkhas at Asun.
Asun Lieutenant-Colonel Jack Fulton's 2/1st Gurkhas were positioned on the south bank of a fast-flowing stream, just to the north of Asun. Unlike the Punjabs, the Gurkhas had no anti-tank guns but engineers had placed demolition charges on the road bridge. The 15th Indian Brigade (now under the command of Brigadier Carpendale) covered the main Trunk Road at Jitra. The 1st Leicestershire Regiment were covering the road and town north of the Jitra River with the 2/9th Jat Regiment on the east flank. The 2/2nd Gurkhas covered the divisional area behind the Leicesters and Jats positions, while the remaining Gurkha battalion (2/9th Gurkhas) protected the 11th Indian Divisions line of retreat. By late afternoon of 11 December, Murray-Lyon had lost the better part of three battalions and was now without any reserve units to commit to the main battle.
11–13 December With the survivors of Garrett's two battalions streaming through the 11th Indian Division and his line of retreat threatened by the Japanese advance south of Jitra at Kroh, Murray-Lyon requested permission from Malaya Command to retire from Jitra to a position he had already selected about south at
Gurun. It was a natural stronghold, though it had not been fortified. General
Arthur Percival refused, fearing that such an early and long retreat would have a demoralising effect on the troops and civilian population. Murray-Lyon was told that the battle must be fought out at Jitra. At 20:30 on 11 December, Saeki's advance guard overran a forward patrol of the 1st Leicesters but was held up by an improvised roadblock until dawn of 12 December. Saeki—believing he was still attacking small British delaying forces—launched his men into a three-hour attack on the Leicesters and Jat positions without success. By midday of 12 December, Saeki realised he was fighting against the main 11th Indian Division positions. General Kawamura (commanding the Imperial Japanese Army's 9th Brigade) placed the 11th and 41st Infantry Regiments in readiness to resume the attack that night. The Jats D Company, running out of ammunition, was overrun soon after. At the same time Lt.Col C. K. Tester, the 2/9th Jats commander, had lost contact with A Company on the right flank. Murray-Lyon was to try to hold North
Kedah, block Japanese tanks on good natural obstacles and to dispose his forces in depth on the two parallel north–south roads which traversed the rice-growing area, to give greater scope to his artillery. At 22:00, the 11th Indian Division were ordered to withdraw to the south bank of the River Kedah at
Alor Star, beginning at midnight. ==Aftermath==