United States invasion of Afghanistan

Shortly after the September 11 attacks in 2001, the United States declared the war on terror and subsequently led a multinational military operation against Taliban-ruled Afghanistan. The stated goal was to dismantle al-Qaeda, which had executed the attacks under the leadership of Osama bin Laden, and to deny al-Qaeda militants a safe base of operations in Afghanistan by toppling the ruling Taliban government.

Source: Wikipedia — United States invasion of Afghanistan (CC BY-SA 4.0)