The berlin blockade increased Western European fear of Soviet aggresssion. As a result Western European nations-Belgium,Denmark,France,Great Britain,Iceland,Italy,Luxembourg,The netherlands,Norway and Portugal joined the US and Canada to form a defensive military alliance , The North Atlantic Treaty Organization. The 12 members pledged military support to one another in case any member was attacked. Greece and Turkery joinged in 1952, and West Germany in 1955