Tales of Suspense #21

Klagg, an alien who visits Earth, becomes so upset upon learning humanity still wages war that he declares war upon the nations of the Earth. The hero of the story convinces communist agents to pool their forces with the democracies in an effort to present a united front against Klagg. The effort is successful because the fact the various nations were able to set aside their differences and band together convinces Klagg to give up his campaign of destruction and leave Earth.