The Liberal Wars (Guerras Liberais), also known as the Portuguese Civil War (Guerra Civil Portuguesa), the War of the Two Brothers (Guerra dos Dois Irmãos) or Miguelite War (Guerra Miguelista), was a war between liberal constitutionalists and conservative absolutists in Portugal over royal succession that lasted from 1828 to 1834. Embroiled parties included the Kingdom of Portugal, Portuguese rebels, the United Kingdom, France, the Catholic Church, and Spain.
The death of King John VI in 1826 created a dispute over royal succession. While Dom Pedro, the Emperor of Brazil, was the king's oldest son, his younger brother Miguel contended that Pedro had forfeited his claim to the throne by declaring Brazilian independence. Pedro briefly entitled himself Dom Pedro IV of Portugal. Neither the Portuguese nor the Brazilians wanted a unified monarchy; consequently, Pedro abdicated the Portuguese throne in favor of his daughter, Maria, a child of 7. In April 1826, to settle the succession dispute, Pedro revised the first constitution of Portugal granted in 1822 and left the throne to Maria, with his sister Isabel Maria as regent.
In the Portuguese Constitutional Charter, Pedro attempted to reconcile absolutists and liberals by allowing both factions a role in the government. Unlike the Constitution of 1822, this new document established four branches of government. The Legislature was divided into two chambers. The upper chamber, the Chamber of Peers, was composed of life and hereditary peers and clergy appointed by the king. The lower chamber, the Chamber of Deputies, was composed of 111 deputies elected to four-year terms by the indirect vote of local assemblies, which in turn were elected by a limited suffrage of male tax-paying property owners. Judicial power was exercised by the courts; executive power by the ministers of the government; and moderative power by the king, who held an absolute veto over all legislation.