When Spain exploded into civil war in July 1936, a conflict whose roots were deep in the Spanish past became the arena for the violent political passions that divided Europe north of the Pyrenees. Germany, Italy, and the Soviet Union intervened actively in the war, using Spain as a testing ground for their military equipment and techniques and their political ideologies. In this first in-depth study of the politics of the International Brigades in the Spanish Civil War, R. Dan Richardson views