The First Chechen War, also known as the War in Chechnya, was a conflict between the Russian Federation and the Chechen Republic of Ichkeria, fought from December 1994 to August 1996. After the initial campaign of 1994–1995, culminating in the devastating Battle of Grozny, Russian federal forces attempted to seize control of the mountainous area of Chechnya but were set back by Chechen guerrilla warfare and raids on the flatlands despite Russia's overwhelming manpower, weaponry, and air support. The resulting widespread demoralization of federal forces and the almost universal opposition of the Russian public to the conflict led Boris Yeltsin's government to declare a ceasefire with the Chechens in 1996 and sign a peace treaty a year later.