1. In 1770, the Boston Massacre occurred - an event that is often considered a precursor to the American Revolution. Although the event took place in Boston, it had significant impacts on the political climate in Washington, then known as the District of Columbia. News of the massacre sparked outrage among colonists and helped to galvanize support for the revolutionary cause.

2. In 1864, President Abraham Lincoln signed the National Banking Act which created a national currency and established a system of national banks. The act was designed to provide stability to the nation's banking system during a time of economic turmoil and played an important role in establishing Washington as a financial center.

3. In 1915, the National Advisory Committee for Aeronautics (NACA) was established in Washington. Considered the predecessor to NASA, NACA played a crucial role in advancing aviation technology and research during a time of rapid technological innovation and growth.

4. In 1963, the United States Supreme Court handed down its decision in the case of Gideon v. Wainwright. The landmark decision, which established the right to counsel for all criminal defendants, had far-reaching implications for the criminal justice system in Washington and across the country.

5. In 2019, the Washington Nationals baseball team held their first-ever Spring Training game at their new facility in West Palm Beach, Florida. The team's relocation to the new facility was a significant event for Washington sports fans, as it marked the beginning of a new era for the team and signaled a renewed commitment to building a winning franchise.