Excerpts from Books and Wikipedia
"The Spanish Civil War (...) took place from 1936 to 1939. Republicans loyal to the elected, left-leaning Second Spanish Republic, in alliance with the Anarchists and Communists, fought against a revolt by the Nationalists, an alliance of Falangists, Monarchists, Carlists, conservatives and Catholics, led by a military group among whom General Francisco Franco soon achieved a preponderant role. Due to the international political climate at the time, the war had many facets, and different views saw it as class struggle, a war of religion, a struggle between dictatorship and republican democracy, between revolution and counterrevolution, between fascism and communism. It has been frequently called the "dress rehearsal" for World War II.
The Nationalists won the war, which ended in early 1939, and ruled Spain until Franco's death in November 1975." [Wikipedia]