The Dawes Plan was an attempt following World War I for the Triple Entente to collect war reparations debt from Germany. When after five years the plan proved to be unsuccessful, the Young Plan was adopted in 1929 to replace it.
decrease in tension during the cold war1: the relaxation of strained relations or tensions (as between nations); also : a policy promoting this2: a period of détente
The Soviet Union invading Afghanistan is what ended detente between the Soviet Union and the United States. The Soviet war in Afghanistan began in 1979.
Easing tension with the Soviet Union through arms control and trade agreements