The Battle of Jerusalem also known as the Fall of Jerusalem occurred during the British Empire's "Jerusalem Operations" against the Ottoman Empire, in World War I, when fighting for the city developed from 17 November, continuing after the surrender until 30 December 1917, to secure the final objective of the Southern Palestine Offensive during the Sinai and Palestine Campaign of World War I. Before Jerusalem could be secured, two battles were recognised by the British as being fought in the Hebron Hills to the north and east of the Hebron–Junction Station line. These were the Battle of Nebi Samwill from 17 to 24 November and the Defence of Jerusalem from 26 to 30 December 1917. They also recognised within these Jerusalem Operations, the successful second attempt on 21 and 22 December 1917 to advance across the Nahr el Auja, as the Battle of Jaffa, although Jaffa had been occupied as a consequence of the Battle of Mughar Ridge on 16 November.
This series of battles was successfully fought by the British Empire's XX Corps, XXI Corps, and the Desert Mounted Corps against strong opposition from the Yildirim Army Group's Seventh Army in Hebron Hills and the Eighth Army north of Jaffa on the Mediterranean coast. The loss of Jaffa and Jerusalem, together with the loss of of territory during the Egyptian Expeditionary Force (EEF) advance from Gaza, after the capture of Beersheba, Gaza, Hareira and Sheria, Tel el Khuweilfe and the Battle of Mughar Ridge, constituted a grave setback for the Ottoman Army and the Ottoman Empire.
As a result of these victories, the British Empire forces captured Jerusalem and established a new strategically strong fortified line. This line ran from well to the north of Jaffa on the maritime plain, across the Hebron Hills to Bireh north of Jerusalem, and continued eastwards of the Mount of Olives. With the capture of the road from Be'e Elsabe' (Beersheba) to Jerusalem via Hebron and Bethlehem, together with substantial Ottoman territory south of Jerusalem, the city was secured. On 11 December, General Edmund Allenby entered the Old City on foot through the Jaffa Gate instead of horse or vehicles to show respect for the holy city. He was the first Christian in many centuries to control Jerusalem, a city held holy by three great religions. The prime minister of the United Kingdom, David Lloyd George, described the capture as "a Christmas present for the British people". The battle was a great morale boost for the British Empire.
Background
thumb|left|Situation at 18:00 on 16 November 1917 as known to GHQ EEF
British General Edmund Allenby, Commander-in-Chief of the Egyptian Expeditionary Force (EEF), had won a decisive victory against the German General Erich von Falkenhayn, commander of Ottoman forces in Palestine, at the Battle of Mughar Ridge on 13 November. The British Empire victory forced von Falkenhayn to withdraw his Seventh and Eighth Armies (commanded by Fevzi Pasha and Kress von Kressenstein respectively) and move his headquarters from Jerusalem to Nablus on 14 November. As the Ottoman III Corps (Seventh Army) reached Jerusalem via the Hebron road after its defeat at Beersheba, it was ordered to develop defences around Jerusalem. This corps held the city while the XX Corps retreated from Junction Station into the Hebron Hills towards Jerusalem. As they retired the XX Corps left strong rearguards to stop or slow the British advance. Time was needed to construct defences and for reorganisation of the depleted and disorganised Seventh Army. When they arrived in the city XX Corps took over responsibility for Jerusalem's defences, while III Corps continued to move northwards from Jerusalem along the Nablus road.
The British War Cabinet had cautioned Allenby not to commit to any operations that might not be sustainable in the long term if the strength of British forces in the area could not be maintained. Their concerns were possibly linked to a peace proposal published on 8 November by the new Russian Bolshevik government between Russia and Germany. The document, scheduled to be signed on 3 March 1918, would constitute a separate peace treaty and result in the withdrawal of all Russian troops from the war. All German forces on the eastern front could then turn their attention to fighting British and French forces elsewhere.
thumb|left|German soldiers in [[Jerusalem in 1914]]
Allenby was aware of the lack of accurate maps of the Hebron Hills and that the history of previous campaigns in the region gave clear warnings against hasty or lightly supported assaults on the strong western ramparts. His front-line forces had been fighting and advancing for an extended period fighting many miles from their bases and were tired and depleted. Now from the railhead at Deir el Belah, Allenby's troops did not have a line of defensive entrenchments behind which they could stop a concerted push by these two Ottoman armies. Such a counterattack could well see them driven back to Gaza and Beersheba.
Allenby reviewed the threat of counterattack and his supply situation and decided that a force large enough to attack into the Hebron Hills and a separate force to operate on the maritime plain could be maintained far from base. He decided to quickly attack Fevzi Pasha's Ottoman 7th Army in the Hebron Hills with the hope of capturing Jerusalem. This would keep pressure on this army in the hope of denying them time to complete their reorganisation, dig deep trenches or worst of all, counterattack.
thumb|Filling fantasies and loading them onto camels near Jaffa|alt=Three soldiers look on while Egyptian workers fill a water fantasie from a pipe
Transporting supplies forward from railhead was a slow but continuous 24-hour-a-day business, because the Ottoman Army had destroyed as much of their infrastructure as they could during their retreat. Only lorries of the British Army Service Corps (ASC) Motor Transport companies and camels of the Egyptian Camel Transport Corps could use the single, narrow, poorly metalled road from Gaza to Junction Station. Between Gaza and Beit Hanun the road was unsealed and deep in sand making it difficult for lorries to proceed, even with a light load of one ton. Supplies were also shipped by sea and landed at Wadi Sukereir, and later at Jaffa. Lack of infrastructure at Jaffa meant all supplies brought via ship had to be cross-loaded onto surf boats, which then had to be unloaded on the beaches. Such operations were heavily dependent on the weather, so the amount of supplies transported by sea was limited.
Feeding an army dependent on horses was a huge task. The marching ration of a horse was of grain a day, which, when multiplied by the 25,000 horses in the Desert Mounted Corps, worked out to over 100 tons of grain a day. One hundred lorries would be needed for the horses as well as transportation for rations required by the troops in the front line.
All available lorries and camels were organised in convoys moving north from the railhead along the Gaza to Junction Station road from Deir el Belah to El Mejdel and then on to Julis, where the 26 and 27 Depot Unit of Supply (DUS) set up advanced supply dumps to serve the Australian Mounted Division and the Anzac Mounted Division. From these dumps the Transport Sections of 5 Company (New Zealand Army Service Corps) and the 32nd, 33rd, and 34th Companies (Australian Army Service Corps) served the Anzac Mounted Division, and the 35th, 36th, and 37th Companies served the Australian Mounted Division. These companies of horse- and mule-drawn wagons could operate to serve their brigades during brigade operations and when required could form into divisional trains during divisional operations. A forward lorry-head was established at Ramleh, where the loads were dumped and the Transport Companies distributed the supplies to the forward units. Members of the Egyptian Labour Corps (as second drivers) worked alongside the Australian Army Service Corps transporting, loading, and unloading the General Service and Limber wagons of supplies ordered by the brigades. The huge endeavour was administered by the supply sections in a similar fashion to the divisional ammunition columns which also worked to supply ammunition to the fighting units in a similarly continuous operation.
Advance by the Desert Mounted Corps continues
On 15 November the commander of Desert Mounted Corps, Lieutenant General Sir Harry Chauvel, issued orders for the Yeomanry Mounted Division (Major General G. de S. Barrow) and the Anzac Mounted Division (Major General E. W. C. Chaytor) to continue the advance on Ramleh and Lud about from Junction Station. On the same day the Yeomanry Mounted Division reached the Jerusalem road after a cavalry charge by the 6th Mounted Brigade (Brigadier General C. A. C. Godwin) at Abu Shusheh. This charge has been described as even more daring than that at Mughar Ridge, owing to the rocky nature of the ground over which the horsemen attacked. The New Zealand Mounted Rifles Brigade (Brigadier General W. Meldrum) secured the left flank of the EEF by occupying Jaffa on 16 November. This city was captured as a result of the victory at Ayun Kara two days earlier, which forced the Ottoman Eighth Army to withdraw over the Nahr el Auja, which enters the sea north-north-east of Jaffa. The Eighth Army's withdrawal placed them to the north of the Ottoman Seventh Army and opened up that army's right flank to attack. As a result, the Seventh Army was forced to move further away from the coastal sector into the Hebron Hills. Here, in front of Jerusalem, Ottoman infantry units created a defensive screen.
Battle
Advance into the Hebron Hills begins
Despite continued pressure by the EEF, the two opposing forces were now operating in terrain which favoured defence. In addition to rearguards left by the Ottoman Seventh Army's XX Corps as it retired into the hills, the Seventh Army had managed to establish a line of mainly single trenches running south and south-west on a series of heights up to from Jerusalem, supported by well-sited redoubts.
thumb|The 4th Light Horse Regiment entering mountain passes near Latron|alt=Mounted troopers in the foreground and another group in the middle distance on a road winding between high hills
On 18 November, while Allenby was at the British XXI Corps headquarters at El Kastine, the decision was made to closely follow the Ottoman Seventh Army into the Hebron Hills. This was in the hope of ensuring that the Ottoman army had little time to regroup or construct defences which, given more time, might prove impregnable.
Allenby's plan was to avoid fighting in or near Jerusalem but to cut all road access to the city and force the Ottoman Army to evacuate it. He ordered two infantry divisions; the 52nd (Lowland) (Major General J. Hill) and the 75th Division (Major General P. C. Palin), and two mounted divisions; the Yeomanry and the Australian Mounted Divisions to begin the advance. They were to move eastwards from Latron, which had been captured on 16 November, in the same direction as the Jaffa to Jerusalem road.
Infantry from the 75th Division was to move up the main road despite several demolitions being carried out by the retiring Ottomans on this good metalled road running east to west through Amwas. On the left and to the north of the 75th Division, infantry from the 52nd (Lowland) Division was to make its way up minor roads or tracks from Ludd towards Jerusalem. And further north on the left of the 52nd (Lowland) Division, the Yeomanry Mounted Division was to move north and north east. Their aim was to cut the Ottoman Seventh Army's lines of communication at Bireh, north of Jerusalem on the Jerusalem to Nablus road.