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.
On February 15th, 1898, over 250 American sailors were killed when the battleship Maine blew up and sank in Havana harbor. The war with Spain began in April, 1898 when Major General William Shafter, a former commander of the 24th Infantry led an expeditionary force of over 17,000 men, including nearly 3,000 Black regulars, into Cuba. (11)