Battle of Dujaila - Prelude

Prelude

Following the setbacks at the Hanna on 21 January 1916, Lieutenant-General Aylmer's Tigris Corps spent the month of February refitting and collecting reinforcements. Despite the pause, the Tigris Corps was still unable to be brought back up to full strength. The 13th (Western) Division had been dispatched as reinforcements from Egypt where it was being brought back to strength following its evacuation from Gallipoli. However, by the end of February, only the 13th Division's first battalions had reached the theatre, and only two of those had been transported up river by end of February.

The British position at Kut was becoming more desperate. Food stocks were estimated to last only until the middle of April, even with the discovery of an additional store of grain in late January. Additionally, there was the concern that time was running out in another way: the weather. Based on the known weather patterns of the region, the latest that the Anglo-Indian Tigris Corps could expect favourable weather to hold was the middle of March. After that, the spring thaw would be in full swing. Combined with the coming rainy season, it would turn the areas along the banks of the Tigris into a flooded quagmire.

Many of battalions of the Tigris Corps remained understrength at the end of March 1916. The problem was particularly acute with the British battalions and the British officers of the Indian Army units. To deal with this, survivors of several units were amalgamated into battalions which approached full strength. Furthermore, replacement drafts meant for units besieged in Kut were formed into provisional units. These provisional units included the Highland Battalion (survivors of 1st Black Watch and 1st Seaforth Highlanders), Dorsets (replacement drafts for 2nd Norfolk and 2nd Dorset regiments in Kut), Composite Dogra Battalion (37th Dogras and 41st Dogras) and the Composite Territorials (remnants of 1/4 Hampshire and 1/5 Buffs (Royal East Kent Regiment)).

In 1916, there were virtually no paved roads in Mesopotamia between Baghdad and Basra. No rail road had been constructed to connect to the cities. Beyond the port of Basra, transport options were limited to animal power, along unpaved tracks near the river, or river craft. Both required adequate water to operate effectively. Although the Tigris was broad, during much of the year it was so shallow that many ships could not navigate it. Going out further from the track along the Tigris, there were marshlands which would flood, especially during the Spring thaw. This left the river as the primary means of long distance transport. Despite the fact that the river was the primary means of transporting men and supplies in theater, the British had insufficient river craft to adequately meet the Tigris Corps' supply needs.

Given the strength of the Ottoman defences at the Hanna, the Anglo-Indian forces needed to find a way around them. On the left bank of the Tigris, this would mean swinging wide around the Ottoman defenses and marching at least 30 miles through the desert. Then, relying on Shatt al-Hayy for their communications, the force would break through the Ottoman lines and link up with the Kut garrison. The other option was to continue along Tigris River, but switching to the right bank. However, this would mean having to break through the Ottoman defenses at Dujaila.

Unwilling to leave the Tigris, which provided the British forces with an easy line of communication to Basra, Lieutenant-General Aylmer made the decision to attempt an advance along the right bank. Like the left bank, the terrain was mostly featureless and devoid of cover. The Ottoman units, with their German advisers, had become adept at camouflaging their positions, making it hard for the British and Indian units to fix them properly. What was known was that Ottomans were in the process of constructing a redoubt at Dujaila. Since there was no way to cover a move across the river and through the Dujaila position, Aylmer and his staff put together a plan that called for a night assault by the majority of his force while a detachment would remain behind on the left bank as a diversion.

However, prior to putting the plan into effect, Aylmer had to get approval of the new commander of I.E.F. D, Lieutenant-General Sir Percy Lake. After the Battle of the Hanna, General Lake had begun to lose faith in Aylmer's abilities as commander of the Tigris Corps. In order to exert greater control over the coming battle, he had replaced Aylmer's chief of staff with his own man, Major-General George Gorringe.

Not only did Lake lack faith in Aylmer's abilities, Aylmer himself had lost confidence in the abilities of his subordinates. Of his two divisional commanders, Major-General Henry D'Urban Kearny, GOC 3rd (Lahore) Division, and Major-General Sir George Younghusband, GOC 7th (Meerut) Division, neither were detailed to the principal commander for the planned operation. Major-General D'Urban Keary would be assigned to command one of the three columns, the other two being commanded by Major-General George Kemball, one of his brigade commanders. Aylmer made his decision claiming that Kemball was a more energetic commander. Major-General Younghusband, who had been the chief proponent of a desert march to outflank the Ottoman lines entirely, was assigned to command the diversion force on the left bank.

Like the British, the Ottoman Sixth Army was also stretched to the limit of logistical support. The lack of any sort of industrial infrastructure (i.e. paved road capable of military transport or railways) made it exceedingly difficult for the Sixth Army to be rapidly reinforced. What the Ottoman army did have going in its favor was time. They had recognized that for the time, they were at the extent of their supply line from Baghdad.

The Ottomans, who had become adept at trench warfare during their victory at Gallipoli, had put their experience to good use. The Ottoman Sixth Army had invested Townshend’s position with an elaborate trench network since December 1915. 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. Because Townshend had adopted a passive defensive stance, even more so since losing his ability to cross the river with the destruction of the pontoon bridge from Kut to the Woolpress village, Von Der Goltz had been able to shift more and more of his troops south. In all, the Ottoman Sixth Army could muster approximately 25,000 men, 1,200 cavalry, and 80 artillery pieces. With Townshend's passivity, Field Marshal Von Der Goltz was able to move the bulk of his forces south, leaving only about 2,000 men to maintain the siege itself. On the left bank, the 52nd, 38th, and part of 35th Ottoman Divisions continued to occupy the Hanna line. 8,500 men, 1,500 cavalry and 32 artillery pieces of the 2nd and 35th Ottoman Divisions defended the right bank of the Tigris at the Dujaila position.

Realizing that the British might try to break the siege by advancing on the right bank, the Ottoman commander ordered the construction of the Dujaila redoubt. Aylmer later testified he chose to attack on the right bank because although the redoubt was sited atop the Dujaila depression, construction had only begun a few days after the Hanna battle in January 1916. By the time of the assault, the Ottomans had significantly improved the position, complete with a glacés estimated to be 25 feet high in some places.