Berlin Crisis (blockade and airlift) of 1948-49
1. Soviet fears of West Berlin as a threat and a base for Western military
2. Reactions to US introduction of Marshall Aid and a new currency into western zones of occupation in Berlin
3. Soviet cutting off of links between the western zones of occupation in Germany and West Berlin
4. US and British airlift of supplies into West Berlin
5. Re-opening of land routes to West Berlin