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.
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The well prepared Ottoman positions, notably the well-sited machine gun nests, forced them to abandon the assault and withdraw the relief force to the base of Ali Gharbi.
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Despite two more relief attempts, the garrison at Kut-al-Amara was forced to surrender to the Ottoman forces on 29 April 1916 (see Siege of Kut).
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Downriver, the Field Marshal von der Goltz and his senior Ottoman commander, Khalil Pasha, erected a series of well sited defensive positions at the Hanna and the Sanniyat on the left bank of the river and the Dujaila along the right bank.