The Action of 31 July 1793 was an inconclusive engagement between a British Royal Navy frigate and French frigate off the New Jersey coastline in the first year of the French Revolutionary Wars. The British captain, George Courtenay of HMS Boston, had arrived off New York City on 28 May and deliberately disguised his ship as a French vessel, fooling a French officer into coming aboard and making him a prisoner of war. Courtenay then sent a message into New York, where he knew a French frigate lay at anchor, challenging the French captain to battle within the next three days.