What day did the protocol ending Spanish-American War hostilities take effect in 1898? The answer is August 12.
The United States and Spain signed the Protocol of Peace in Washington, D.C., on August 12, 1898. This agreement suspended active hostilities and provided the basis for negotiating a permanent peace treaty. President William McKinley then proclaimed the cessation of hostilities with Spain.
The protocol followed decisive American victories, including the destruction of the Spanish fleets at Manila Bay and Santiago de Cuba, the capture of Santiago, and the occupation of other Spanish positions. Its terms required Spain to relinquish sovereignty over Cuba, cede Puerto Rico and Guam to the United States, and permit the United States to occupy Manila while the final disposition of the Philippines was negotiated.
August 12 is not the same date as the Treaty of Paris. The treaty was signed on December 10, 1898, and formally ended the war in diplomatic and legal terms after ratification. It took effect on April 11, 1899, when the ratifications were exchanged. Thus, August 12 marks the end of fighting, while December 10 marks the signing of the definitive peace settlement.
The date can also be confused with July 3, when the Battle of Santiago de Cuba destroyed Spain’s Caribbean fleet, or December 10, the treaty date.