Six old American photos, six moments of American history. 

(Dead soldiers lie on the battlefield of Gettysburg. The number of soldiers killed in the Civil War is 750,000, and more than 50,000 were killed in this battle.)

I. The Battle of Gettysburg (July 1 to July 3, 1863, a turning point in the American Civil War.)

In the bloodiest battle of the American Civil War, the Union Army resisted the attack of the South Army led by General Lee and obtained a decisive victory, ending General Lee's second and final invasion of northern states.

(Skull of a bison killed in the United States in 1870.)

Second, the westward movement of the United States was a massacre of bison.

In 1883, a museum expedition went to the west to look for bison specimens. As a result, less than 200 bison were found throughout the west. By 1903, the Great Plains bison had reduced to 34 heads.

(Human first flight.)

3. Kitty Hawk, North Carolina, 1903, the first flight of the Wright Brothers Flight One. Orville was the pilot, and Wilbur followed at the wingtip.

Fourth, February 23, 1945-US soldiers raise the American flag on Iwo Jima Hill.

One of the fiercest fighting in the Pacific War, the battle lasted from February 19, 1945 to March 26. The U.S. Army sacrificed 6821 soldiers, while Japan lost 23,786 soldiers, and all but 22,703 people were killed except 1,083 captured.

(October 26, 1967 — "Flower Power".)

Fifth, on October 21, 1967, the United States broke out toward the Washington Peace Army, demanding that the Vietnam War be stopped and that American soldiers in Vietnam be withdrawn.

Demonstrators chanted anti-war songs, shouted slogans against the war of aggression, and marched toward the Pentagon where the US Department of Defense is located. Demonstrators surrounded the Ministry of Defence building and attacked it. They clashed with military and police armed with various weapons, and some people rushed into the Pentagon to fight the military and police in the corridor. About 700 people were arrested and 1,400 were injured.