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In page Manuel II of Portugal:

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One day later, once it was clear that the Republicans had taken the country, Manuel decided to embark from Ericeira on the royal yacht Amélia IV for Porto, with armed Republicans arriving as the ship departed. It is unclear whether his advisers motivated Manuel to change his intentions[3] or whether he was forced to change his destination en route,[4] but the Royal Family disembarked in Gibraltar shortly later, after they received notice that Porto had fallen to the Republicans. The coup d'état was complete, and the Royal Family departed for exile,[5] arriving in the United Kingdom, where he was received by the King.