[Goetz_von_Berlichingen]

There were also Africans in the British and French armies.

And even more obscure . . .
http://www.schistory.org/schm/bhessians.html

[Pharmboy]

One of the saddest tales from the RevWar (in addition to the prison ships in NY Harbor) were the thousands of Africans who died in British camps of typhus and smallpox when they were told to leave for freedom.