After the Waziristan expedition of 1894 Wana was occupied by British troops in order to dominate the Gomal and Waziristan; but on the formation of the North-West Frontier Province in 1901 it was decided to replace these troops by the South Waziristan militia, who now secure the safety of the pass.
South of the Kurram is the Tochi valley, separating it from Waziristan, an isolated mountainous district bounded on the south by the Gomal and the gorges that lead to the Wana plain.
The lower ridges of the frontier mountain system are usually bare and treeless, but here and there, as in the Kaitu valley, in northern Waziristan and round Kaniguram in the south, are forest clad and enclose narrow but fertile and well-irrigated dales.
The chief peaks in the province are Kaisargarh (11,300 ft.) and Pir Ghol (11,580 ft.) in Waziristan; Shekh Budin (4516 ft.), in the small range; Sikaram (15,621 ft.) in the Safed Koh; Istragh (18,900 ft.), Kachin (22,641 ft.) and Tirach Mir (25,426 ft.), in the Hindu Kush on the northern border of the Chitral agency; while the Kagan peaks in Hazara district run from 10,000 ft.
The military cantonments and posts in Malakand, Dir, Swat and Chitral were also enumerated, as were those in the Tochi Valley (the Northern Waziristan Agency) and in the Gomal (the Southern Waziristan Agency), the former figures being included in the census returns of Bannu district, and those of the latter in the returns of Dera Ismail Khan.