Raid on the New York Battery was a raid by the Sons of Liberty and Hearts of Oak militia on August 23, 1775, in the early days of the American Revolutionary War. The raid was on the British cannons in New York City. The 21 royal cannons from the New York Battery were taken under fire from the ship HMS Asia offshore. The cannons became a target for American patriots shortly after the outbreak of the Revolutionary War on April 19, 1775. The seizure of the cannons helped the patriots of the Revolutionary War.