By the close of the 19th century, the United States was no longer a continental power, but had become a nation with interests that spanned the globe from the Ca

In late 1945, it became clear that the Soviet Union was an aggressive power. American military planners began to develop strategies to deal with the frightening

By the close of the 19th century, the United States was no longer a continental power, but had become a nation with interests that spanned the globe from the Ca