The direct route to the Caspian from Hamadan was not possible, because Kuchik Khan and his Jungalis still held the Manjil-Resht section of the road, and Dunsterville unaided was not then strong enough to turn them out. True, there were the Russian auxiliaries under Bicherakoff, but these valued allies were making ready for an offensive in their own leisurely fashion, and were not to be "speeded up" by any known methods of British hustling.

From Hamadan to Tabriz by way of Zinjan is about three hundred miles. The route for the most part lies over difficult and mountainous country, where supplies are scarce or hard to procure. The wild and scattered tribesmen are not noted for extreme friendliness. Zinjan itself is 115 miles from Hamadan in a northerly direction. The next important stage on the road to Tabriz is Mianeh, eighty-five miles north-west of Zinjan. From Mianeh, Tabriz itself is distant about one hundred miles.

Tabriz, the ancient Tauris, and capital of the province of Azarbeijan, is the largest city in the Persian Empire, and the most important commercial centre in all Iran. It is the residence of the Valiahd, or heir-apparent to the Persian throne. It occupies much the same position in north-western Persia as does Meshed in the north-eastern part of the country. Marco Polo visited it during his long overland trek to far Cathay, and found it a fair city, full of busy merchants and wealthy citizens.

But for the British, seeking to arrive within fighting distance of the Turks, Germans, and Russian Bolsheviks overrunning the Caucasus, Tabriz had its own special military importance. It was a point of great strategic value. Julfa, on the Russian-Persian frontier, and ninety miles from Tabriz, is the terminus of the Trans-Caucasian Railway which runs to Tiflis, the Caucasian capital and main British objective. Tiflis is 320 miles from Tabriz. The railway from the former city continues west to Poti and Batum, the shipping ports on the Black Sea, and east (also from Tiflis Junction) to Baku and its oilfields on the Caspian Sea.

From Julfa, connecting with the Trans-Caucasian Railway, a Russian company had built a branch line to Tabriz, and an extension to Sharaf Khane on the eastern shore of Lake Urumia. On the lake itself was a fleet of Russian-owned steamers, which maintained communication between the railhead at Sharaf Khane and Urumia city, famous as the legendary birthplace of Zoroaster, which is on the western shore of the lake, and about twenty-five miles from Sharaf Khane.

When the Russian Army, stricken by the deadly plague of Bolshevism, retreated northwards towards Tiflis, they accommodatingly left behind at Sharaf Khane, for the use of the first comer, their fleet of lake steamers, hundreds of guns of heavy and medium calibre, dumps of shells and small-arms ammunition, thousands of serviceable rifles, and quantities of other military stores.

The Turkish frontier line, passing about forty-five miles west of Urumia, continues due north to its junction with the territorial boundaries of Russia and Persia on the perpetual snow-clad summit of the Greater Mount Ararat. The region round Lake Van having been cleared of potential enemies—the Russians had retired, and the Armenians were put to the sword—the Turks, swinging eastward, lost no time in crossing the frontier and violating Persian territory. They pleaded military exigencies for the step they had taken, and turned a very deaf and unsympathetic ear to the mere paper remonstrances of the Persian Government. But in the invaded territory they met with severe and unexpected opposition, not from their own Islamic kindred, but from hated and despised Infidels of the Christian sect.

Urumia is the centre of a thickly populated Christian district, and the headquarters of French, Armenian, American, Russian, and British religious missions to the Nestorian Christians. These latter, with few exceptions, inhabit the plains and lowlands; but in the bleak, almost inaccessible mountain regions, live and thrive some brave and warlike tribes who are also Nestorian Christians, and who are generically known as Jelus. They had suffered much from religious persecution at the hands of Kurd, Persian, and Turk, and over and over again in their mountain eyries, with rifles in their hands, they had put up a brave fight against the Moslem oppressor in defence of hearth and home and the temples of their faith.

Nestorians and Jelus once more made common cause against the common Turkish enemy. Already warned by the fate of the hapless Armenians, they were under no delusion as to what would befall them should the Osmanli triumph—it meant extermination, root and branch.