What led industrial workers to gain collective bargaining power?

Which statement below would be the strongest evidence for the historians view

Analyze the maps from the previous section, then identify and discuss which two maps show the biggest move from colonialism to independence.

What was the main cause of the russian revolution? a. the protests against the war with poland b. the tremendous war losses of world war 1 c. the protests against the treaty of brest- litovsk d. the losses dictated by the treaty of versailles