The global base system stems from pre-WWII total-defense thinking

Evidence

The buildup of U.S. troops around the world was the result of a profound change in how U.S. leaders thought about the very idea of “defense,” as well as a newly expansive concept of “national security.” Even before the United States entered World War II, Roosevelt and other leaders had started developing a vision of the world as intrinsically threatening, in which any instability and danger, no matter how small or how far removed from the United States, was seen as a vital threat. “No attack is so unlikely or impossible that it may be ignored,” argued Roosevelt in 1939. In a world of “permanent danger,” the military thus needed to be a “permanently mobilized force” ready to confront threats wherever they might appear. “If the United States is to have any defense,” Roosevelt and others believed, “it must have total defense.” — David Vine, Base Nation_ How U.S. Military Bases…, 91

Categorization

• XREF: Connects to contemporary arguments about ever-expanding homeland security justifications; parallels the reader’s interest in how framing drives institutional expansion.
• corroborated: 2 independent passages support this claim — David Vine, Base Nation_ How U.S. Military Bases…, 91