To mark the beginning of Black History Month, we"re paying tribute to one of the few all-Black combat regiments in World War I, true heroes who were instrumental in achieving the Allied victory. The storied 369th Infantry Regiment, famously known as the Harlem Hellfighters, served in frontline trenches for 191 days—longer than any other American unit in the war—and suffered 1,500 casualties, the most losses of any American regiment. They fought under the 16th Division of the French army, because many white Americans refused to go into combat alongside Black soldiers.