1. The Washington Metropolitan Area Transit Authority (WMATA) was founded on August 7, 1967. This organization was created to maintain and improve the public transportation system in the Washington, D.C. metropolitan area, which includes Washington, D.C., Maryland, and Virginia.

2. On August 7, 1782, a group of Native American tribes signed the Treaty of Fort Stanwix with the United States government. This treaty helped to establish peace between the Native American tribes and the new American government, and it played a significant role in shaping the country's early relations with Native Americans.

3. The National Museum of the American Indian opened its doors to the public on August 7, 2004. This museum is dedicated to preserving the history and culture of Native Americans, and it is situated on the National Mall in the heart of Washington, D.C.

4. August 7, 1861 saw the start of the American Civil War Battle of Belmont. This battle, which took place near Columbus, Kentucky, was the first battle of the Civil War to be fought in the Western Theater.

5. The District of Columbia public school system was established on August 7, 1804. This system was created to ensure that all children in the District of Columbia had access to basic education, and it has since grown into a robust and diverse public school system.