Labor unions began to form during the industrial revolution because

Labor unions began to rise in the post-Civil War America in order to aid workers in unfairness such as unsafe or unsanitary working conditions, low pay, long hours, ect. Many Americans thought the creation of labor unions would affect these disservices or possibly end them all completely.  

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it is the dominance of   the spanish language and roman catholic region in mexico, french being the official language of several african countries, and the existence of a western-style government in south asian countries

these acts divided the south into five military districts.