Hellfighters’ heroism

*Note: This essay was published in the Los Angeles Times print edition on February 15, 2019. It can also be found online here. A century ago, on Feb. 17, 1919, the U.S. Army’s 369th Infantry Regiment, nearly 3,000 African American soldiers and known as the Harlem Hellfighters, returned from World War I and marched up Fifth Avenue…