For those in the Western zones of occupation, the advent of the Cold War undermined the demilitarization process by seemingly justifying the key part of Hitler's foreign policies — the "fight against Soviet bolshevism".[4] In 1950, after the outbreak of the Korean War, it became clear to the Americans that a German army would have to be revived to help face off the Soviet Union, and both American and West German politicians confronted the prospect of rebuilding the armed forces of the Federal Republic.[5]