Several of these questions are opinion, so I can't really help with those, but I can answer the first one.
After World War I, the League of Nations was created to try to help keep the peace and solve problems between nations. The same went for the United Nations after World War II. There were also the treaties that ended the wars. (You'll have to decide whether or not these were actually successful.)
The answer is good because The louisiana purchase of 1803 doubled the size of the united states, gave the country complete control of the port of New Orleans, and provided territory for westward expansion
hope this helps !!!!!
Answer:
Because the Ohio River flowed westward, it became a convenient means of westward movement by pioneers traveling from western Pennsylvania.
Explanation:
