The Occupational Medal is called the Army of Occupation Medal and was given to anyone who served a minimum of 30 consecutive days in "occupied territories of former enemies" from 1945-1955. Those who served in Berlin were eligible for it from 1945-1990.
There are also several devices that can be mounted, one is a tab saying "Japan", another a tab saying "Germany" and a third is an airplane which, if I am not mistaken, represents the Berlin Airlift? However, the Berlin and Japan bars are not authorized to be mounted on the ribbon when just the ribbons are worn. I belive it's mounted on the medal when full-size medals are worn.
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