The pullman strike (1894) was significant in american labor history because it showed that a) unions were powerful enough to break the restrictions placed on them by management. b) unions were infiltrated by anarchists after people were killed during the protest in chicago. eliminate c) non-violent civil disobedience was a successful way to protest racial segregation in the "jim crow" south. d) the needs and concerns of union members mattered less to the government than the needs and concerns of industrial executives.