The most important outcome of the Treaty of 1818 was that Britain claimed land west of the Mississippi.

the US-Canada border was set at the 49th parallel.

Americans were forbidden to fish off the coast of Canada.

How did the united states respond when north vietnam attacked a us warship and sent troops to south vietnam in the early 1960s? a.the united states declined to assist south vietnam against the north. b.us leaders authorized south vietnam to invade north vietnam. c.the president did not sign the gulf of tonkin resolution. d.congress authorized the president to escalate the conflict.