1. In 1790, the Residence Act was signed into law, which established Washington D.C. as the capital of the United States. This made July 10th a significant day in the history of the city.

2. On July 10, 1864, during the Civil War, Union troops under General Jubal Early attacked Fort Stevens in Washington D.C. This was the only time in American history that the capital city was attacked during a war.

3. In 1934, the first public housing project in Washington D.C., called Green Homes, was opened on July 10th. It provided affordable housing for low-income families.

4. On July 10, 1951, the Washington Senators baseball team played their first game under the lights at Griffith Stadium. They beat the Boston Red Sox 4-3.

5. In 2004, the Smithsonian National Museum of the American Indian opened on July 10th. It is located on the National Mall and showcases the history and culture of Native Americans.