British_rule_in_Portuguese_India
Goa, Daman and Diu were one of Portugal's oldest colonies, being established in 1510.[1][2] During the Napoleonic Wars, the Portuguese were concerned at being unable to defend their empire from predatory French or her allied navies.[3] Due to the historic Anglo-Portuguese Alliance, British India was keen to assist in Goa's security. Britain dispatched a 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.[4] The soldiers built huge fortifications in these areas to help defend them. (These fortifications were subsequently demolished after the British departed.) This amicable agreement ended in 1813 thanks largely to the massive defeat of the French and Spanish fleets at Trafalgar in 1805.[5] There are two distinct phases of the period, from 1797 to 1798 and from 1802 to 1813 (in 1814 Napoleon was exiled to the island of Elba). For the next century, no country was capable of challenging the power of the Royal Navy. Goa could benefit from Pax Britannica.[6][7]
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During this time, the Portuguese were still in charge of the administration of the territory (the local government was headed by the Viscount of Mirandela from 1794 to 1806, then by the Count of Sarzedas from 1806 to 1816).[8]