As the nation celebrates military heroes on National Purple Heart Day, AOL takes a look at some of the most compelling, heart-wrenching and heartwarming stories behind those who have earned the prestigious award.
Henry Lincoln Johnson was a member of the famed African-American WWI infantry unit known as the Harlem Hellfighters. The Hellfighters spent more time in combat than any other American unit in the conflict, but continued to face racism and segregation when they returned home to the United States.
Johnson was manning a listening post with 17-year-old Needham Roberts on May 15, 1918, when German soldiers attacked. Roberts was seriously injured in the fire fight, and Johnson was left to defend their position. After his gun jammed, Johnson even fended off the enemy by using his weapon as a club.
See photos of Henry Lincoln Johnson and the famed Harlem Hellfighters:
Purple Heart Recipient: Henry Lincoln Johnson
National Purple Heart Day profile: Henry Lincoln Johnson
This undated photo provided by the U.S. Army shows Army Pvt. Henry Johnson. Pvt. Johnson was one of two World War I Army heroes on Tuesday June 2, 2015, who finally received the Medal of Honor they may have been denied because of discrimination, nearly 100 years after bravely rescuing comrades on the battlefields of France. (U.S. Army via AP)
New York Gov. George Pataki, right, along with Herman Johnson, left, and Pfc Gerald Jilliard of the New York Army National Guard, prepare to place a wreath at the gravesite of Johnson's father, World War I hero Sgt. Henry Johnson at Arlington National Cemetery in Arlington, Va. Thursday, Jan. 10, 2002. The wreath laying was to honor Sgt. Johnson, a famed member of the Harlem Hellfighters. (AP Photo/Ken Cedeno)
FILE - This July 10, 2014 file photo shows a statue of Henry Johnson, a World War I hero in an all-black outfit, the 369th Infantry Regiment, or Harlem Hellfighters, in Washington Park in Albany, N.Y. The decision to grant a posthumous Medal of Honor for Johnson moves to President Barack Obamaâs desk with Congress agreeing to waive time restrictions on the award. (AP Photo/Mike Groll, File)
In this Tuesday, Nov. 25, 2014, photo, enlistment cards for the New York National Guard are displayed at the New York State Military Museum, in Saratoga Springs, N.Y. The museum is digitizing the post-World War I personnel records of thousands of soldiers who were part of a storied all-black regiment lauded by the French for its wartime exploits but essentially shunned by the U.S. military. (AP Photo/Mike Groll)
Soldiers of the U.S. 369th Infantry Regiment parading down 15th Avenue, New York, on their return from service in Europe during World War I, circa 1919. The regiment was an African-American outfit formed in 1913 from the 15th Infantry Regiment and its troops were popularly known as the Harlem Hellfighters or the Black Rattlers. (Photo by FPG/Hulton Archive/Getty Images)
Movie poster advertises 'Our Colored Fighters,' a WW1 recruiting documentary on the all-black 369th Regiment nicknamed the 'Harlem Hellfighters,' 1918. (Photo by John D. Kisch/Separate Cinema Archive/Getty Images)
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Despite sustaining several gunshot wounds, Johnson killed four German soldiers and injured an estimated 10 to 20 others. The French quickly awarded Johnson the Croix du Guerre, France's highest military honor, but he was given no special recognition by the United States.
Due to his war injuries, Johnson was unable to hold down a steady job when he returned home and he struggled with alcoholism. Smithsonian Magazine reports that he died penniless in 1929 at age 32.
In 1996, President Clinton posthumously awarded Henry Lincoln Johnson the Purple Heart, 67 years after his death.