Freedmen

Uh oh! Looks like F.B.I. Director J. Edgar Hoover is on to you! He sees Garvey as a "notorious Negro agitator, he has started spying on UNIA! His spies sabotage the Black Star Line ships by adding foreign substances to the fuel, and in 1922, Garvey is convicted of mail fraud related to the said line. He is imprisoned for 5 years, and is later deported.

...Perhaps it isn't too late to go with DuBois?