The assassination of the Austrian Archduke, , helped spark WWI because it caused to declare war on Serbia, therefore triggering the alliance system.

the labor movement in the united states grew out of the need to protect the common interest of workers

for those in the industrial sector organized labor unions fought for better wages reasonable hours and safer working conditions

  in the 19th century trade unionism was mainly a movement of skilled workers.

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women should get jobs in the war industries

explanation:

during the time of the war women usually stayed back and got jobs to support the war by making bullets and machinery used in the war.

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