The "boat people" of Vietnam were the largest mass departure of asylum seekers by sea in modern history.  Estimates range from 250,000 to 500,000 refugees who risked their lives to escape Communist oppression, despite a 1 out of 3 death rate on the high seas.  Although some of the refugees were farmers, most before occupied Vietnam's cities.
- Vietnam's boat people: 25 years of fears, hopes and dreams - Scott McKenzie, CNN Interactive
- Boat People - The Journey