April Revolt

The April Revolt, or Abrilada, in the history of Portugal, was an absolutist political revolt that took place in April 1824. It succeeded the Vilafrancada (1823) and foreshadowed the Portuguese Civil War (1828–1834).

On 30 April 1824, Infante Miguel, who had been appointed generalissimo of the Portuguese Army, had top civilian and military people of the country arrested and placed in the dungeons of the Castle of São Jorge and the Tower of Belém. Among them stood out the figures of the Quartermaster-General of Police, Baron Rendufe, the Duke of Palmela (then in government in coalition with the Earl of Subserra) and the Viscount of Santa Marta. D. Miguel, who had the support of his mother Carlota Joaquina, considered them guilty of being supporters of liberalism and of his father, D. John VI. Miguel's stated intention was to end what he called "pestilential bevy of free-masons", a reference to Freemasonry liberal and constitutional.

Various military corps were then sent to the former Palace of the Inquisition, (where the Teatro Nacional D. Maria II stands today), in Rossio, Lisbon, then installing its headquarters. He then gave orders to besiege the Palace of Bemposta, where the king was accompanied by his English adviser, General William Carr Beresford.

...
Wikipedia