| |
| 1968, Jan. 19 |
| |
| British-Soviet agreement to cooperate in applied science and technology. | 1 |
| |
| March–June |
| |
| A new period of harassment and obstruction of traffic between West Germany and West Berlin by the East German authorities. | 2 |
| |
| June 15 |
| |
| Extensive Soviet and Warsaw Pact maneuvers in Poland, East Germany, and Czechoslovakia. | 3 |
| |
| July 1 |
| |
| The EC became a single trading area for all industrial produce, with a common external tariff. | 4 |
| |
| Aug. 20–21 |
| |
| Occupation of Czechoslovakia by Warsaw Pact forces, creating an acute international crisis (See Aug. 20–21). | 5 |
| |
| Sept. 12 |
| |
| Albania formally withdrew from the Warsaw Pact. | 6 |
| |
| Oct. 16 |
| |
| Soviet agreement with the new Czech government permitting the stationing of troops in Czechoslovakia. | 7 |
| |
| |
