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why were Americans unsure of how the government should handle bringing the south back into the union

Respuesta :

Manly because iof the choices the South had made, the government, and also because of War.

they though that the government would let the south have slaves back and forget about the Civil war

ElijahRobins10
The main reasons were that most of the choices the South made weren't of their standards, their type of government was exactly suitable I should say, and also because of war. 

Hope this is the answer you were looking for and that it helps. :)