 While only 9.5% of soldiers serving in Vietnam were black, they comprised nearly 20% of front line troops, and 25% or more of airborne divisions.Black servicemen were twice as likely to re-enlist in the Navy, Marine Corps and Air Force and three times as likely to re-enlist in the Army as their white counterparts, not for any sense of adventure, but because they found the monetary rewards to be promising and they were treated more equally.In the 1950s, shortly after World War II, urban areas were overtly divided into blocks by race.