The siege of the Fortress of São Filipe, was a battle fought from 27 March 1641 to 4 March 1642 as part of the Portuguese Restoration War, near Angra, Azores, between Spanish and Portuguese over the control of the fort of São Filipe. After 11 months of intense fighting the Portuguese were victorious and the Spanish garrison was defeated with very heavy losses. References Sources Lourenço, Paula.Battles of Portuguese History - Defence of the Overseas. - Volume X. (2006) São Filipe Sao Filipe São Filipe São Filipe São Filipe São Filipe 1641 in Portugal 1641 in Spain 1642 in Spain