Since the end of World War II, plans for the mutual defense of the United States and of the rest of the Free World have included the requirements that foreign troops be stationed in various countries throughout the world, and, for the most part, those troops are American.
Schuck, Edwin G.
"Status of Armed Forces Abroad,"
Naval War College Review: Vol. 11
, Article 4.
Available at: https://digital-commons.usnwc.edu/nwc-review/vol11/iss2/4