During the Cold War era, the firm was well known for its range of jet-powered trainer aircraft, the L-29 Delfin and L-39 Albatros. It also developed derivatives of the L-39, the L-59 Super Albatros and the L-159 Alca military light combat jet. Aero Vodochody is believed to have handled the biggest aircraft industrial programme to take place across any of the Council for Mutual Economic Assistance (COMECON) countries except for the Soviet Union itself. Following the fall of the communist government in Czechoslovakia during 1989, Aero Vodochody experienced a disruptive period of business, having lost a major portion of the market for its jet trainers. Sales noticeably declined during the 1990s in Eastern Europe as well as in NATO countries as a result of the peace dividend.