The city was captured by the British during the Seven Years' War. The episode began on June 6, 1762, when at dawn, a British fleet, comprising more than 50 ships and a combined force of over 11,000 men of the Royal Navy and Army, sailed into Cuban waters and made an amphibious landing east of Havana. The British immediately opened up trade with their North American and Caribbean colonies, causing a rapid transformation of Cuban society. Less than a year after Havana was seized, the Peace of Paris was signed by the three warring powers thus ending the Seven Years' War. The treaty gave Britain Florida in exchange for the return of the city of Havana on to Spain.