The most devastating war in modern human history was over, but with two of the most prominent militaries now locked in ideological and political differences. Despite this, the U.S. was once again willing to demobilize most of her military besides what was necessary to enforce occupation duties in former axis nations. For example, in 1945, almost 41 percent of the nation’s GDP went toward military spending. By 1948, it was only 7.2 percent of GDP. Although there were some fears by Nobel laureates such as economists Gunnar Myrdal and Paul Samuelson about a postwar economic collapse, the U.S. economy grew and the general public focused inward, once again preferring some degree of isolationism like prior wars.

The American army of occupation lacked both training and organization to guide the destinies of the nearly one million civilians whom the fortunes of war had placed under its temporary sovereignty.”

— Col. Irwin L. Hunt, Civil Affairs, Third Army, Post WWI

But isolationism was not possible. The old Imperial order was shattered, with even the victorious British Empire now broke. Forced to deal with the occupational duties in not just Germany, but also Austria, Japan, and Southern Korea, the U.S. was thrust into a role the public was historically resistant of. To walk away from this meant leaving the new world order to the Soviet Union, and to the Truman administration, this was not politically acceptable.