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Afghanistan, often called the crossroads of Central Asia, has had a turbulent history. In 328 BC, Alexander the Great entered the territory of present-day Afghanistan, then part of the Persian Empire, to capture Bactria (present-day Balkh). Invasions by the Scythians, White Huns, and Turks followed in succeeding centuries. In AD 642, Arabs invaded the entire region and introduced Islam.  

Afghanistan, often called the crossroads of Central Asia, has had a turbulent history. In 328 BC, Alexander the Great entered the territory of present-day Afghanistan, then part of the Persian Empire, to capture Bactria (present-day Balkh). Invasions by the Scythians, White Huns, and Turks followed in succeeding centuries. In AD 642, Arabs invaded the entire region and introduced Islam.  

Arab rule gave way to the Persians, who controlled the area until conquered by the Turkic Ghaznavids in 998. Mahmud of Ghazni (998-1030) consolidated the conquests of his predecessors and turned Ghazni into a great cultural center as well as a base for frequent forays into India. Following Mahmud's short-lived dynasty, various princes attempted to rule sections of the country until the destructive Mongol invasion of 1219 led by Genghis Khan.  

Arab rule gave way to the Persians, who controlled the area until conquered by the Turkic Ghaznavids in 998. Mahmud of Ghazni (998–1030) consolidated the conquests of his predecessors and turned Ghazni into a great cultural center as well as a base for frequent forays into India. Following Mahmud's short-lived dynasty, various princes attempted to rule sections of the country until the destructive Mongol invasion of 1219 led by Genghis Khan.  

Following Genghis Khan's death in 1227, a succession of petty chiefs and princes struggled for supremacy until late in the 14th century, when one of his descendants, Tamerlane, incorporated Afghanistan into his own vast Asian empire. Babur, a descendant of Tamerlane and the founder of India's Moghul dynasty at the beginning of the 16th century, made Kabul the capital of an Afghan principality.  

Following Genghis Khan's death in 1227, a succession of petty chiefs and princes struggled for supremacy until late in the 14th century, when one of his descendants, Tamerlane, incorporated Afghanistan into his own vast Asian empire. Babur, a descendant of Tamerlane and the founder of India's Moghul dynasty at the beginning of the 16th century, made Kabul the capital of an Afghan principality.