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The main British attack was postponed to combine with attacks by the French Sixth Army on the village of Combles, south of Morval, which were intended to bring the Sixth Army closer to the German defences between Moislains and Le Transloy, near the Péronne–Bapaume road (N 17).
Anti–British and anti–Armenian demonstrations led Allenby to order Chauvel to occupy the towns of Marash, Urfa, Killis and Aintab and dismiss the Ottoman commander of the Sixth Army, Ali Ihsan.
That unit operated as part of the U.S. Sixth Army and was tasked with management of frontline casualties.
The Ottoman Sixth Army, reinforced, pursued and laid siege to the town after attempts to storm the Anglo-Indian positions failed.
After these defeats, the relief force (now reduced to around 10,000 men) was ordered once again to attempt to break through the Ottoman lines and continued its movement up the Tigris until it encountered 30,000 of the Ottoman Sixth Army, under the command of Khalil Pasha, at the Hanna defile, 30 miles downriver of Kut-al-Amara.
The Ottoman Sixth Army, now reinforced, followed and laid siege to the Anglo-Indian force at Kut-al-Amarrah.
Its forces were composed of the Fifth, Sixth and Sixty-sixth Army under the command of the Chinese Expeditionary Force in Burma, commanded by Lt. General Joseph Stilwell, Lt. General Luo Zhuoying was his Executive Officer.
From the Ottoman perspective; Siege of Kut prevented Sixth Army to perform other operations.
Shortly thereafter, the United States Sixth Army, under the command of Lieutenant General Walter Krueger, established its headquarters in Tanauan.