During the Spanish Civil War from 1936 - 1939, thousands from around the world flocked to Spain to volunteer in the fight against fascism. Roughly 25 percent of fighters in the International Brigades were Jewish.
Within the International Brigades, the Naftali Botwin Battalion within the Palafox Battalion stood out even more so. Its composition consisted of largely Polish-Jewish volunteers. As well as many Jews from British Mandate Palestine.