British rule in Portuguese India
Goa, Daman and Diu were one of Portugal's oldest colonies, acquired in 1510 AD or the next few years. During the Napoleonic Wars, the Portuguese were concerned at being unable to defend their empire from the predatory French or her allied navies. Due to the historic Anglo-Portuguese Alliance, British India was keen to assist in Goa's security. Britain dispatched a Royal Navy (after 1707)|Royal Navy] squadron as well as an army of 10,000 soldiers. The British soldiers were posted at strategic locations like Aguada, Miramar, Caranzalem, Palacio do Cabo and Morumugão. The soldiers built huge fortifications in these areas to help defend them. This amicable agreement ended in 1813, thanks largely to the massive defeat of the French and Spanish fleets at Trafalgar in 1805. There are two distinct phases of the period, from 1797 to 1798 and from 1802 to 1813. For the next century, no country was capable of challenging the power of the Royal Navy. Goa could benefit from Pax Britannica.
During this time, the Portuguese were still in charge of the administration of the territory.