The action of 3 October 1624 was a naval engagement that took place near San Pietro Island, Sardinia, during the war against the Barbary corsairs. A squadron of galleys from the Spain (Kingdom of Naples), Grand Duchy of Tuscany and Papal States under engaged a squadron of six Algerian ships under Azan Calafate. The Algerians were defeated, their flagship was destroyed, and four ships were captured. Also, the Christian slaves they owned were freed.