Meanwhile, on their right the Battle of Nablus began with an attack by the XX Corps in the Judean Hills against the Asia Corps and sections of the Seventh Army defending Nablus, during the afternoon of 19 September once it became apparent the Battle of Sharon was succeeding, while Chaytor's Force held the extreme right flank in the Jordan Valley against the Fourth Ottoman Army and began their attacks northwards in the Jordan Valley to capture the Jisr ed Damieh bridge.

After leaving a detachment to hold the Jisr ed Damieh bridge and two other fords against any further retreating columns, Chaytor's Force advanced eastwards to attack and capture the garrisons at Shunet Nimrin and Es Salt.

[1][2] Chaytor's Force held the right flank from their junction with the XX Corps in the Judean Hills eight miles (13 km) north west of Jericho, across the Jordan Valley, and then southwards through the Ghoraniye and Auja bridgeheads to the Dead Sea.

[6] All of the supplies and reinforcements for the Ottoman Fourth Army force which had faced the EEF garrison occupying the Jordan Valley came through Amman.

[1][9] The Fourth Army consisting of 6,000 infantry and 2,000 cavalry supported by seventy-four artillery pieces was commanded by General Mohammed Jemal Pasha.

[17][18][19][Note 5] The ration strength of Chaytor's Force at the end of operations on 30 September was "8,000 British, 3,000 Indian, 500 Egyptian Camel Transport Corps troops.

[20][21] Lieutenant General Harry Chauvel, the Australian commander of the Desert Mounted Corps, instructed Chaytor to hold his ground "for the present", but to closely watch the Ottoman forces during around-the-clock patrolling, and to immediately occupy any abandoned enemy positions.

[29][30][31][32][33] The Nablus to Damieh road was captured early in the morning of 22 September by Meldrum's Force which included the New Zealand Mounted Rifles Brigade and the British West Indies Regiment.

[36][37] The EEF became aware of the withdrawal of the Fourth Army at 23:35 on 22/23 September, when orders were issued for an attack on Shunet Nimrin, Kabr Mujahid and Tel er Ramr.

This force was to move eastwards along the main Ghoranyeh to Es Salt road towards Shunet Nimrin, while the immobile section was to remain in defence in the right sector of the Jordan Valley occupied zone.

[29][36][41][42] The 2nd Light Horse Brigade was delayed by the difficult track up the Wadis Jeri'a and Sir which did not reach Ain Hummar on the main road five miles (8.0 km) east of Es Salt until the afternoon of 24 September.

The main road had been blown up in places by the retreating Ottoman Army, forcing Chaytor to pause on 24 September to wait for supplies as well.

[44][45][46][Note 7] Orders were then issued for the New Zealand Mounted Rifles and the 2nd Light Horse Brigades to advance to Amman beginning at 06:00 on 25 September.

[Note 8] The 1st Light Horse Brigade meanwhile advanced along the railway to the north of Amman and captured several guns and hundreds of prisoners who were attempting to retreat.

[45][46][47] A squadron from the Auckland Mounted Rifles Regiment was sent to Madaba, where they captured a number of prisoners and a very large amount of grain and emergency rations for the men were supplemented by food bought from the inhabitants.

[45][60] The 38th and 39th Battalions Royal Fusiliers under the command of Lieutenant Colonel Patterson, had concentrated at the Auja bridgehead ready to follow the 20th Indian Brigade to Shunet Nimrin.

The remainder of the garrison had already withdrawn northwards, following orders received from Liman von Sanders on 21 September, four days before Chaytor's attack.

[60][62][63] A Fourth Army column seen at Mafrak, north of Amman in the early morning of 25 September was bombed by Australian aircraft which also destroyed the railway station, a long train and several dumps, blocking the line.

By evening, the light horse brigade held the water at Wadi el Hamman, while one regiment occupied Kalaat ez Zerka.

[45][60][67][68] The 5th Light Horse Regiment meanwhile had reached three miles (4.8 km) north of Ziza at 10:30, on 28 September where the Ottoman II Corps surrendered.