hi! happy to check these for you :) here is the correct order:
1. kennedy becomes president (january 20, 1961)
2. bay of pigs invasion (april 17-20, 1961)
3. washington-moscow hotline set up (august 30, 1963)
4. lyndon b johnson becomes president (november 22, 1963)
5. leonid brezhnev secretary in ussr, khrushchev removed (october 14, 1964)
6. tet offensive (january 31, 1968)
7. nuclear non-proliferation (signed july 1, 1968)
8. invasion of czechoslovakia (august 20, 1968)
9. policy of vietnamisation (january 28, 1969)
10. salt 1 agreed in may (1969)
11. basic treaty signed in december (1972)
12. paris peace agreement (january 27, 1973)
13. nixon resigns, replaced by g ford (august 8, 1974)
14. salt 2 agreed but not ratified (june 17, 1979)
15. ussr invades afghanistan (dec 24, 1979)
16. carter doctrine in january (1980)
17. ronald reagan becomes president (1981)
hope this helps you! sorry it took me a while, i'm studying ww2, the cold war, and surrounding events at the moment and i wanted to verify the timeline.