All these divisions were still in place and took part in the Third Afghan War at the end of World War I. In supporting the war effort, India was left vulnerable to hostile action from Afghanistan. A Turco-German mission arrived in Kabul in October 1915, with obvious strategic purpose. Habibullah Khan abided by his treaty obligations and maintained Afghanistan's neutrality, in the face of internal opposition from factions keen to side with the Ottoman Sultan. Despite this, localised actions along the frontier still took place and included Operations in the Tochi (1914–15), Operations against the Mohmands, Bunerwals and Swatis (1915), Kalat Operations (1915–16), Mohmand Blockade (1916–17), Operations against the Mahsuds (1917) and Operations against the Marri and Khetran tribes (1918). On the North East Frontier between India and Burma punitive actions were carried out against the Kachins tribes between December 1914 – February 1915, by the Burma Military Police supported by the 1/7th Gurkha Rifles and the 64th Pioneers. Between November 1917 – March 1919, operations were carried out against the Kuki tribes by auxiliary units of the Assam Rifles and the Burma Military Police (BMP). The other divisions remaining in India at first on internal security and then as training divisions were the 5th (Mhow) Division, the 8th (Lucknow) Division and the 9th (Secunderabad) Division. Over the course of the war these divisions lost brigades to other formations on active service; The 5th (Mhow) Division lost the 5th (Mhow) Cavalry Brigade to the 2nd Indian Cavalry Division. The 8th (Lucknow) Division lost the 8th (Lucknow) Cavalry Brigade to the 1st Indian Cavalry Division and the 22nd (Lucknow) Brigade to the 11th Indian Division. The 9th (Secunderabad) Division lost the 9th (Secunderabad) Cavalry Brigade to the 2nd Indian Cavalry Division and the 27th (Bangalore) Brigade which was sent to British East Africa. The other pre war units the Burma Division, remained in Burma throughout the war on internal security duties, likewise the Aden brigade remained in Aden. In 1901 oil had been discovered in commercial quantities at Masjid-e-Suleiman at the head of the Persian Gulf. At the start of the war in 1914, the privately owned Anglo-Persian Oil Company which owned the concessions for these fields was about to be bought by the British Government, primarily to fuel the British Fleet.