Union troops continued to occupy Fort Sumter in 1860 because

Union troops continued to occupy Fort Sumter in 1860 because  the    Confederacy could not seize federal property. as the North and South had already agreed not to seize each other's forts.

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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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the answer is true sir