The Invasion of 1950

The year is 1950, but not the 1950 we know.  The Second World War ended in 1943.  Hitler never declared war on the United States and is currently master of an empire that stretches from the Atlantic coastline of France to the Ural Mountains in Russia.  Hundreds of millions are dead or enslaved as Hitler's followers make his dreams real, but the Fuhrer is still not satisfied.  To the west, Britain remains independent - and, beyond it, the United States of America.
Since 1943, the world has enjoyed an uneasy peace. That is about to change ...