Lisbon Regicide
The assassination of King Carlos and the Prince Royal was the effective end of a constitutional monarchy in Portugal (later confirmed by the 5 October 1910 revolution). The regime functioned for another 33 months with growing agitation and demands for reform (although considerably less than in the future First Republic). It cannot be denied that the weak and permissive attitude in the Government of Acclamation was an incentive for the Republican Party to attempt another coup. The assassinations did not change the system of government; instead, they delayed the change.
History of Portugal (1834–1910)
Manuel II would reign for only a short time, as republican forces continued to attack the monarchy and its institutions, even though the young king was considered a popular monarch. His unexpected accession to the throne (18 years of age), was marked by the brutal murder of his father and brother, yet his reign was pragmatic and respected the principles of the constitutional monarchy. Despite threats from the ultra-militant members of the Republican Party and the Carbonária, King Manuel courageously took responsibility for upholding the institutions of the State and the rule of law.