At 1245 hours on 13 November, orders were received for 6 Mounted Brigade to capture the El Mughar Ridge. The enemy were dug-in on the ridge on two prominent spurs, the Buckinghamshire Yeomanry were to attack the right hand spur and the Dorset Yeomanry the left hand spur, with the Berkshire Yeomanry being held in reserve. On the flat ground between the Brigade and the Turks ran the narrow Wadi Jamus, wide enough only to take horsemen in single file. Two Squadrons of Bucks Yeomanry were already in the wadi and the Dorset Yeomanry were ordered to join them. The Brigade's three machine gun sections, 17th Machine Gun Squadron and the Berkshire Royal Horse Artillery were ordered to take up positions to support the attack.
At 1500 hours the Bucks Yeomanry emerged from the wadi to cross some 3,000 yards of open, fire swept ground to reach their objective. The Dorset Yeomanry also emerged on their left to cover some 4,000 yards of similarly open ground. 'A' Squadron was ordered to gallop the spur and then attack dismounted. 'B' and 'C' Squadrons followed and dismounted where A Squadron's horse holders were seeking to make use of the limited cover available. Here they too formed-up, fixed bayonets and advanced up the hill.
The Dorset Yeomanry took their spur, capturing eight machine guns and many prisoners. Captain (Adjutant) Robertson, although wounded, turned one of the captured machine guns on the retreating Turks and for his gallant action was awarded the Military Cross. The Bucks Yeomanry also successfully captured their objective, thus securing the whole ridge. Once this was apparent the Berkshire Yeomanry was deployed around the left hand spur, rounding up numerous prisoners. In all, the Brigade captured 18 officers, 1,378 ORs, fourteen machine guns and two field guns.
In this action the Regiment lost Sergeant Guppy and 8 Other Ranks (OR) killed in action, Captain Hoare mortally wounded, Captain (Adj) Robertson and Lieutenant Beechcroft and 43 ORs wounded and 80 horses killed. The Regiment won two Distinguished Service Orders, one MC, three Distinguished Conduct Medals and seven Military Medals.
The famous painting by James Beadle of this Charge depicts the Buckinghshire Yeomanry's part in the action, led by the left handed Major Bulteel. The Bucks Yeomanry lost 6 ORs killed, 3 officers (one mortally) and 45 ORs wounded and were awarded one DSO and one MC in the action.
6 Mounted Brigade's next task was to advance and capture the ridge from Sidun to Aba Shusheh. At 0600 hours on the 15 November the Bucks and Berks Yeomanries attacked the ridge, while the Queens Own Dorset Yeomanry was ordered to capture Sidun village. Two squadrons charged the village from the south , while 'B' Squadron worked its way around the back and charged from the north, capturing over a hundred prisoners, one Krupp Gun and two machine guns. The gun is today on display at Sherborne Castle. Major Wingfield-Digby commanding 'B' Squadron was awarded the DSO for his courage and for the way he had handled his Squadron.
On his appointment as GOC General Allenby was instructed by Lloyd George to capture of Jerusalem before Christmas 1917. To achieve this he decided he must secure roadway that ran from Nablus to Jerusalem, which was heavily defended by the Turks. 6 Mounted Brigade advanced into the Judean Hills, and on the 20 November British attacked the enemy position, meeting very strong resistance around Beirtunia, some four miles short of their objective. In this action and until relieved the Regiment lost Captain Yeatman and three ORs killed, Lt Colonel Randolf Baker (Commanding Officer) and two other officers were wounded together with 20 ORs. The Allied line held where the advance had been stopped, in spite of heavy counter attacks on the 27th and 28th November.
On 29 November, the Regiment was relieved by infantry and withdrew to Katrah. Ten days later the Regiment returned to camp at El Medjel, where it spent Christmas 1917 and New Year.
On the 9th December Jerusalem surrendered after General Allenby's forces overcame Turkish resistance at Beirtunia. Allenby had comfortably achieved Lloyd George's objective of liberating Jerusalem as a Christmas present to the Allies.