What 2 factions were fighting against each other in the Spanish civil war why did Germany and Italy become invloved?

The Spanish Civil War (1936-1939) was primarily fought between the Republicans, who supported a democratic government and included leftist factions, and the Nationalists, led by General Francisco Franco, who sought to establish a fascist regime. Germany and Italy became involved by supporting the Nationalists; Adolf Hitler and Benito Mussolini saw the conflict as an opportunity to test their military capabilities and to establish a fascist ally in Spain, which aligned with their broader objectives of expanding influence in Europe. Their involvement significantly impacted the war's outcome, providing crucial military aid and support to the Nationalists.