Why this document is being written?

How did rhe transcontinental railroad effected westward migration

What country was south vietnam resist a communist takeover before the united states stepped in? a. germany b. france c. britain d. japan

Quick! what was germany’s main goal after world war i? a) to the united states develop the plan for the league of nations b) to make france return all of the territory it had occupied during the war c) to remain a world power d) to become allies with the united kingdom