The United States of America, as supplier of extensivemateriel support to U.S. allies during World War II; or post-war U.S. as the manufacturer and possessor of the greatest quantity of advanced military weaponry in the world, in the service of defending democratic forms of government.
Origin
Introduced to wide usage (although probably not first used) by U.S. President Franklin Delano Roosevelt in December, 1940.
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