This history reveals how radical threats to the United States empire became seditious threats to national security and exposes the antiradical and colonial origins of anti-Asian racism. Menace to Empire transforms familiar themes in American history. This profoundly ambitious history of race and empire traces both the colonial violence and the anticolonial rage that the United States spread across the Pacific between the Philippine-American War and World War II. Moon-Ho Jung argues that the US national security state as we know it was born out of attempts to repress and silence anticolonial subjects, from the Philippines and Hawaiʻi to California and beyond.   Jung examines how various revolutionary movements spanning the Pacific confronted the US empire. In response, the US state closely monitored and brutally suppressed those movements, exaggerating fears of pan-Asian solidarities and sowing anti-Asian racism. Radicalized by their opposition to the US empire and racialized as threats to US security, peoples in and from Asia pursued a revolutionary politics that engendered and haunted the national security state--the heart and soul of the US empire ever since.