American Hegemony and the Rise of Emerging Powers notes

As the world's largest military and economic force since WWII, the United States assumed responsibility for constructing and preserving the world's defence system. While headed by the United States, the European protection structure was focused on the concept of national security. It ensures that states who entered this defence shield would be able to ward off any future aggressor. Instead, in Asia, bilateral negotiations between Southeast Asian countries and Japan and the US laid the groundwo...

As the world's largest military and economic force since WWII, the United States assumed responsibility for constructing and preserving the world's defence system. While headed by the United States, the European protection structure was focused on the concept of national security. It ensures that states who entered this defence shield would be able to ward off any future aggressor. Instead, in Asia, bilateral negotiations between Southeast Asian countries and Japan and the US laid the groundwo...