Who fought on the side of the Republicans in the Spanish Civil War?

anti-communist groups

fascist rebel troops

a professional army

international volunteers

International volunteers fought on the side of the Republicans in the Spanish Civil War, some of them were communists some simply left leaning volunteers

Correct answer choice is:

International volunteers

Explanation:

In the 1930s, Spain was an intensely isolated country that was politically split within right-wing Nationalist and left-wing Democratic people. The Nationalist body was made up of monarchists, landowners, corporations, the Roman Catholic Church and the artillery. The Republicans consisted of the workers, the trade alliances, communists, and farmers.