Cambodian immigration to the United States surged after 1975, driven by catastrophe and its aftermath. The primary reasons:
The Khmer Rouge (Pol Pot) regime killed 1.7–2.2 million (~25% of population) via execution, forced labor, starvation, and disease. Survivors fled to Thai border camps (Khao-I-Dang, Site 2, etc.)—refugees, not voluntary migrants.
Families were scattered across camps and countries. The U.S. Refugee Act of 1980 and Orderly Departure Program enabled chain migration: one member resettled → sponsored relatives. This shaped settlement clusters (Long Beach, Lowell, Seattle, Philadelphia, Minneapolis).
Post-genocide Cambodia was devastated—infrastructure, economy, human capital destroyed. The U.S. offered jobs (manufacturing, service, later professional), education access, and a path to middle-class stability impossible in 1980s–90s Cambodia.
The U.S. admitted ~150,000 Cambodian refugees (1975–1994) under Refugee Act / UNHCR referral. Asylum granted based on persecution/fear of return. Later, Amerasian Homecoming Act (1987) brought children of U.S. servicemen.
Many arrivals were urban, educated elites (teachers, doctors, officials) targeted by Khmer Rouge. They saw U.S. education as a way to rebuild skills, credentialize, and eventually contribute to Cambodia's reconstruction (some returned post-1993).
The Cambodian-American story is one of survival, trauma, resilience, and community rebuilding—distinct from voluntary economic migration.