Occasion:
In 1830 Great Britain and France demanded satisfaction for the attacks on their subjects in Lisbon, and their squadrons appeared in the Tagus. Great Britain obtained an indemnity and an apology: the French admiral carried off the best ships of Don Miguel’s navy. In 1831 Pedro came over from Brazil and raised troops for the reconquest of Portugal, which began in the following year. Don Carlos was making common cause with Don Miguel when the King of Spain died in 1833, and his child Isabella was declared Queen, with Christina, his wife, as Regent. Rebellion broke out, and Don Carlos was proclaimed King in several provinces.