Who can help me introduce the 13 line on the American flag?

The American flag has 13 red and white stripes and 50 white stars on a blue background. It is called the Stars and Stripes.

At first, there were only 13 stars and 13 stars on the star-spangled banner, representing 13 states at the beginning of American independence. They are Rhode Island, Connecticut, new york, New Jersey, Pennsylvania, Maryland, Delaware, Virginia, North Carolina, South Carolina and Georgia on the Atlantic coast of North America.

Later, by means of war and redemption, the United States seized large colonies of Britain, France, Spain and Russia in North America, occupied many lands in Mexico, and established many new states, which successively joined the United States.

Therefore, the U.S. Congress passed a bill stipulating that every time a state is added, a star must be added to the national flag, but the lever remains the same. In this way, with the continuous expansion of American territory, the number of stars on the Stars and Stripes is also increasing, eventually reaching 50.