In November 1938, two months after the founding congress of the Fourth International, seven members of the Spanish Workers' Party of Marxist Unification on trial in Barcelona declared their support for a "fighting Fifth International".
1938年11月，即第四国际第一次大会举行两个月后，在巴塞罗那受审的马克思主义统一工人党七名成员宣布他们支持建立“一个战斗的第五国际”。