The irony of the slaves fighting for freedom in the revolutionary war:
Wikepedia: "The African American Patriot who gave loyal service to the Continental Army found that the postwar military held no rewards for them. State legislatures like Connecticut and Massachusetts in 1784 and 1785 banned all blacks, free or slave, from military service. Southern states banned all slaves but some states allowed free men to serve in their militias. In 1792, the United States Congress formally excluded the African American from military service, allowing only "free able-bodied white male citizens" to serve."