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historic region in eastern Afghanistan, about 5,000 square miles (13,000 square km) in area and comprising the upper valleys of the Alingar, Pich, and Landay Sind rivers and the intervening mountain ranges. Its northern boundary is the main range of the Hindu Kush, its eastern the Pakistani border, its southeastern the Konar (Kunar) Valley, and its western the mountain ranges above the Panjsher and Nejrab valleys. The region is mountainous, rainy, and forested.