There are many candidates in various times & from different countries: I suppose it depends on your view of Heroism. Douglad Bader springs to mind, a man with 2 artificial legs who went on to be a fighter pilot in WW2. Leonidas at the Pass of Thermopolae. Nelson at Trafalgar. John Chard at Rorkes Drift. (3 Brits in the first 4... Guess my nationality !) General MacArthur in the Pacific war in WW2.Alex the Great. Napoleon. Wellington. Audie Murphy. Biggles.....................
Audie Murphy was the most decorated American soldier in World War2.
Woodrow Wilson
He was a world war 2 hero.
The Germans sunk with their u-boats (submarines) the famous American cruise: The Lusitania AI-
JF Kennedy