LEARN ABOUT BLACK HISTORYClick on a stamp to learn more! Buffalo Soldiers Carter Woodson Mary McLeod Bethune Elijah McCoy Frederick Douglass Greensboro Sit-In Harriet Tubman Jack Johnson Jan E. Matzeliger Josh Gibson Madam C.J. Walker Marcus Garvey Matthew Henson Sojourner Truth Tuskegee Airmen W.E.B. Du Bois