The Vikings became less powerful after
many diseases affected the Viking community.
other explorers began sailing to the Americas.
people learned to defend themselves.
their boats started sinking.

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.

How do state and federal courts differ in the united states

Which would be good historical evidence when studying manifest destiny?