Of 10,524 homeless veterans assessed in a 43-site VA program, 50 percent served during the Vietnam War era, compared to only 29 percent of all veterans in the general population. This reflects the greater risk of homelessness among men aged 30-44 rather than the impact of Vietnam Era service. The proportion of homeless veterans who served in the Vietnam Theater (44.9 percent), and the proportion exposed to combat fire (40.5 percent) were similar to those of nonhomeless veterans. Homeless combat veterans who are not White were more likely to have psychiatric, alcohol, and medical problems than homeless noncombat Vietnam veterans who are not White.