The Cold War and the Era of Détente By em2019 May 8, 1963 Test Ban Treaty 1964 Fall of Khrushchev Jul 2, 1965 US bombing of North Vietnam began 1968 Invasion of Czechoslovakia 1968 Non-proliferation Treaty 1969 Brandt became chancellor of FRG 1970 USSR-FRG Moscow Treaty Jul 12, 1970 Warsaw Treaty Mar 9, 1971 Four-Power Treaty on Berlin 1972 SALT I 1972 Basic Treaty between FRG and GDR 1973 Paris Peace Accords 1974 SALT II negotiations 1975 Helsinki Final Act