How did vespucci's second voyage affect available world knowledge?

What effect did john hay’s open door policy letters have on the imperial powers of britain, france, germany, russia, and japan? a. it provoked the imperial powers to declare war on the united states. b. it caused the imperial powers to restrict trade in their trade with china. c. it warned the imperial powers that the united states would soon declare war on china. d. it signaled to those powers that the united states would take a larger role in world affairs than before.

What city of ancient russia was heavily influenced by the byzantine merchants?

Who commanded fort union in the 1850's? what were their contributions to fort union?