What are three reasons why people immigrated to the United States to work in western mines?

Ahistorian who compares the expansion of political systems to the expansion of economic systems is organizing history by

What industry was exempt from the child-labor laws passed in the factory act of 1833?

Plz ! after the first battle of bull run general ivan mc dowell was removed from command of the union army he was replaced by a. general ulysses s. grant. b. general george mcclellan. c. general robert e lee. d. general george meade.