The First Chechen War, also referred to as the First Russo-Chechen War, was a conflict between the separatist Chechen Republic of Ichkeria and the Russian Federation from 1994 to 1996. After a mutually agreed-upon treaty and terms, the Russians withdrew until they invaded again three years later, in the Second Chechen War of 1999–2009.
During the dissolution of the Soviet Union in late 1991, Chechnya came under the control of a secessionist regime led by Dzhokhar Dudayev. Russian president Boris Yeltsin supported anti-Dudayev militias until 1994, when he launched a military operation to "establish constitutional order in Chechnya". Thousands of Chechen civilians were killed in aerial bombings and urban warfare before Grozny was captured in March 1995, but a Russian victory was denied as efforts to establish control over the remaining lowlands and mountainous regions of Chechnya were met with fierce resistance and frequent surprise raids by Chechen guerrillas. Despite the killing of Dudayev in a Russian airstrike in April 1996, the recapture of Grozny by separatists in August brought about the Khasavyurt Accord ceasefire and Russia–Chechnya Peace Treaty in 1997.