How did world war 1 act as a turning point in world history

Was american neutrality between september 1939 and december 1941 a tragic mistake

This is a picture of workers in a factory. why was this picture most likely taken? to advertise that kids could get jobs to expose the horrors of child labor to show pride in children at work to show that night workers were needed o

During the cold war, the united states was involved in certain regional conflicts due to fears later called the domino theory, which stated which concept?