Leander Willett, with the Congressional Gold Medal on behalf of all of the “Harlem Hellfighters” of World War I during a ceremony on Capitol Hill on Wednesday in Washington, D.C. (Andrew Harnik | Getty Images)The Harlem Hellfighters of the New York National Guard’s 369th Infantry Regiment were posthumously honored this week with a Congressional Gold Medal. The regiment that came to be known as the Harlem Hellfighters served in the trenches of World War I for 191 days, growing legendary for their fighting abilities. The Harlem Hellfighters: Fighting Racism In The Trenches Of WWI The Harlem Hellfighters broke barriers as the first African-American infantry unit to fight in World War I. Their story is retold in a new graphic novel written by Max Brooks, author of World War Z. The Smithsonian Institution, which will house the Congressional Medal, has been at the center of that effort.