As we all know, the United States is a country of immigrants, many of its residents are descendants of colonizers, they have a strong sense of personal heroism, coupled with the United States gun ownership act, so Americans basically do not need too long to train to become qualified soldiers after joining the army, which is very different from our country, which is basically an army of peasants carrying hoes.
During the First World War, due to the late entry of the US military into the war, there were not many opportunities for performance, and the US army, as an emerging army, had little combat experience, and the battlefield was also looked down upon by the old British and French troops.

Sergeant York
Corporal York was a brilliant gunner before joining the army, and the legend was able to easily hit the head of a turkey at a distance of one hundred yards, so that a sharpshooter went to the European battlefield and played a battle, with a rifle and an M1911 pistol, killed more than twenty Germans, and captured 132 Germans, winning glory for the newly rising American army. The movie Cobia York is based on his true story. York's story also made the M1911 pistol famous.
M1911
During World War II, the U.S. military fought in the Pacific Theater and the European Theater, and a large number of heroes emerged in both battlefields, the most representative of which were John Bethelone and Audi Murphy.
I believe that many people's understanding of John Bethelon comes from the American drama Pacific, the author is also, the play Betheron holding M1917 to sweep the Japanese army shot let me remember this hero, of course, this is also a true story, I wonder is that M1917 this water-cooled heavy machine gun can not go anywhere, the Chinese battlefield in the same period also has a lot of Maxim and Thirty-section heavy machine guns, performance and M1917 is almost the same, how our heavy machine gun was easily killed by the Japanese grenade launcher, John Bethelone is so lucky? Could it be that the Japanese troops who rushed to Guadalcanal did not even have a grenadier, and how could they be slaughtered by Bethelon like the Zulus?
John Bethelon
M`1917
Let's talk about Audi Murphy on the Western Front of World War II, my understanding of this Jun comes from a weapons documentary, familiar people have guessed it, that is, the M2 heavy machine gun, the narrator in the evaluation of this weapon, by the way mentioned Audi Murphy, I also rushed to Baidu.
M2
Audi Murphy became famous in the Battle of the Salient, in a battle, Audi Murphy alone manipulated the M2, repelled the German army in three directions, destroyed many armored targets, of course, also killed a lot of German troops, won time for the main force to counterattack, and the difference with the above characters is that the film and television theme about Audi Murphy has not yet, some people say that Captain America is based on him, but Captain America is a mythical story after all, and the gap with the real Audi Murphy is too big.
Audi Murphy
The strength of the US military is not only that they have strong firepower and advanced weapons, but their cultural soil is also more likely to give birth to the above-mentioned lone heroes.