1. Afghanistan has borders with Pakistan, former Soviet republics, Iran, and a short border with China. It became a unified state in the 1700s but remained poor and underdeveloped.
2. In the 20th century, Afghanistan had shifting alliances with Britain and the Soviet Union. A communist coup in 1978 installed a pro-Soviet government and led to a Soviet invasion in 1979 to support the new regime.
3. The Soviet withdrawal in 1989 was followed by a civil war and the rise of the Taliban regime in the 1990s. Al Qaeda attacks from Afghanistan in 2001 prompted a U.S.-led invasion that overthrew the Taliban.