Which 6 of these historical events happened in 1968?

Tet offensive, Rfk ination, bay of pigs, jungle terrain, us troops, vietcong, vietnamization, election of nixon, project head start, blockade, the french, LBJ withdraws, MLK ination, medicad/medicare, ho chi minh trail, hotline, my lai macre , kent state shootings, threat of nuclear conflict, economic opportunity act, and the invasion of Cambodia.