Why were the events of 1453 in Constantinople, and the Treaty between Spain in Portugal in 1494 significant events in "American history?

answer: the ocean

explanation: if you map out 30 n and 40 n latitude, you will get the ocean

a drastic rise in oil prices ended decades of postwar.

your answer is 1930's

explanation

this is just around the time the great depression was starting and putting the us ecnomy into ecnomic failure causing the goverment to take a much larger rule to try and pieace it back together