Portal:United States/Anniversaries/August/August 23
- 1775 – American Revolutionary War: King George III delivers his Proclamation of Rebellion to the Court of St James's stating that the American colonies have proceeded to a state of open and avowed rebellion.
- 1782 – American Revolutionary War: British forces under Edward Despard complete the reconquest of the Black River settlements on the Mosquito Coast from the Spanish.
- 1784 – Western North Carolina (now eastern Tennessee) declares itself an independent state under the name of Franklin; it is not accepted into the United States, and only lasts for four years.
- 1831 – Nat Turner's rebellion of enslaved Virginians is suppressed.
- 1954 – The first flight of the Lockheed C-130 multi-role aircraft takes place.
- 1970 – Organized by Mexican American labor union leader César Chávez, the Salad Bowl strike, the largest farm worker strike in U.S. history, begins.