The state of Oklahoma had many reservations back then. Therefore, I believe that in<span> the late 1800s, the federal government attempted to place all plains Indians on reservations, most of which were located in the state of Oklahoma.
During this period, the main ancestors of the US were forcibly moved to reservations. This made their territory restricted severely compared to the time when they were free to move anywhere. </span>
I believe one of them is the Gettysburg Address
There are many reasons why Ferdinand Magellan’s voyage was considered a
turning point in world history, but the best option would be that "(3) One of his ships was the first to circumnavigate
<span>Earth"</span>
A country would want to get a larger military to overpower or to stand ground against other counties. "Problems" that this could cause to a nation is to be over militarized and not care about its citizens, problems to surrounding nations is that they would feel threatened by a larger military.
