What is one significant way transportation changed in the united states in the first half of the 19th century

Thinking back to previous chapters, analyze america’s policies toward indians from the washington administration to the removal of indians from the southeastern states in the 1830s and early 1840s. what ideas and policies about indians remained the same? which changed? why?

What event brought the us into wwii? what conflicts happened after the us entered the war? i know the first part of this question, i need with the second part.

Which factor determines the organization of political parties at the local level