From 1250 in 1885, of which 903 were in Europe and 347 in Asia, the mileage of railways had increased to some 4440 in 1909, of which 1377 are in Europe, 1810 in Asia Minor, 418 in Syria and 835 fall to the share of the Hejaz railway, including the Ed-Dera-Haifa branch.
Turkey's Arabian possessions comprise, besides El-Hasa on the Persian Gulf, the low-lying, hot and insalubrious Tehama and the south-western highlands (vilayets of Hejaz and Yemen) stretching continuously along the east side of the Red Sea, and including the two holy cities of Mecca and Medina.
The army is divided into seven army-corps (ordus), each under the command of a field marshal, and the two independent commands of Tripoli (Africa) and the Hejaz.
The headquarters of the ordus are I., Constantinople; II., Adrianople; III., Salonica; IV., Erzerum; V., Damascus; VI., Bagdad; VII., Yemen; 15th division, Tripoli; 16th division, Hejaz.
Only the first six army-corps have, however, their proper establishment: the seventh ordu and the commands of Tripoli and the Hejaz have only garrison troops, and are fed by drafts from the first six ordus.