After the arrival of Lord Dufferin as governor-general the incident known as the Panjdeh Scare brought Britain to the verge of war with Russia. During the preceding decades Russia had gradually advanced her power from the Caspian across the Turkoman steppes to the border of Afghanistan, and Russian intrigue was largely responsible for the second Afghan war. In February 1884 Russia annexed Merv. This action led to an arrangement in August of the same year for a joint Anglo-Russian commission to delimit the Afghan frontier. In March 1885, while the commission was at work, Lord Dufferin was entertaining the amir Abdur Rahman at a durbar at Rawalpindi. The durbar was interrupted by the news that a Russian general had attacked and routed the Afghan force holding the bridge across the river Kushk, and the incident might possibly have resulted in war between Britain and Russia but for the slight importance that Abdur Rahman attributed to what he termed a border scuffle. Increase in the Army. The incident, however, led to military measures being taken by the government of Lord Dufferin, which had far-reaching effects on Indian finance. The total strength of the army was raised by 10,000 British and 20,000 native troops, at an annual cost of about two millions sterling; and the frontier post of Quetta, in the neighbourhood of Kandahar, was connected with the Indian railway system by a line that involved very expensive tunnelling. Imperial Service troops. The Panjdeh incident was likewise the cause of the establishment of Imperial Service troops in India. At the moment when war seemed imminent, the leading native princes made offers of pecuniary aid. These offers were declined, but it was intimated to them at a later date that, if they would place a small military force in each state at the disposal of the British government, to be commanded by state officers, but drilled, disciplined and armed under the supervision of British officers and on British lines, the government would undertake to find the necessary supervising officer, arms and organization. The proposal was widely accepted, and the Imperial Service troops, as they are called, amount at present to some 20,000 cavalry, infantry and transport, whose efficiency is very highly thought of. They have rendered good service in the wars on the north-west frontier, and also in China and Somaliland. Later in the same year (1885) occurred the third Burmese war. For the causes of the dispute with King Thebaw, and a description of the military operations which ensued before the country was finally pacified, see BURMA.