 Chechen industry began to fail as a result of many Russian engineers and workers leaving or being expelled from the republic combined with the Soviet era's crippling of the non-Russian/Armenian/Ukrainian populace (Chechens, some Ingush and Nogais, Jews) through Russian-only schooling, heavy discrimination in the public sector of the workforce, and other similar measures (even as late as 1989, Checheno-Ingushetia was ruled by a bureaucracy of ethnic Russians).During the undeclared Chechen civil war, factions both sympathetic and opposed to Dudayev fought for power, sometimes in pitched battles with the use of heavy weapons.In March 1992, the opposition attempted a coup d'état, but their attempt was crushed by force.