Mikhail Gorbachev major campaign to limit alcohol consumption, which Gorbachev—who believed it would improve health and work efficiency—oversaw. His wife keenly supported the measure. As a result, crime rates fell and life expectancy grew slightly between 1986 and 1987. The reform had significant costs to the Soviet economy, resulting in losses of up to $100 billion between 1985 and 1990. Gorbachev later considered the campaign to have been an error. In April 1986 the Chernobyl disaster occurred; in the immediate aftermath, officials fed Gorbachev incorrect information to downplay the incident. As the scale of the disaster became apparent, 336,000 people were evacuated
Soviet–Afghan War was likely an important factor in the Soviets' decision to withdraw. Gorbachev had been attempting to remove the Soviet Union from the economic stagnation that had set in, under the leadership of Premier Brezhnev, and reform the Soviet Union's economy and image across the board with Glasnost and Perestroika. Gorbachev had also been attempting to ease cold war tensions by signing the Intermediate-Range Nuclear Forces Treaty in 1987 with the U.S. and withdrawing the troops from Afghanistan whose presence had garnered so much international condemnation. Gorbachev regarded confrontation with China and resulting military build ups on that border as one