Note that it is not the value in each field in the primary key that must be unique, but it is the combination of values in all fields that make up the primary key. The C/SIDE database system does not support tables that do not have any keys.
Spanish Civil War ('36-'39). The outbreak of civil war in Spain in 1936 was viewed in Europe and the United States as an ideological struggle between the forces of fascism, led by General Francisco Franco, and the forces of republicanism, called Loyalists.
Introduction. The Battleship Maine. Photographic History of the Spanish American War, p. 36. On April 25, 1898 the United States declared war on Spain following the sinking of the Battleship Maine in Havana harbor on February 15, 1898. The war ended with the signing of the Treaty of Paris on December 10, 1898.