Answer:
#1 Its primary goals were to map Louisiana territory and to find a route to the Pacific. Carried out during the presidency of Thomas Jefferson, the Louisiana Purchase of 1803 doubled the size of the United States and was by far the largest territorial gain in American history.
The right answer is cities
The second answer would have to be correct, because I believe this is focused on the Paleolithic Era.
Answer: Japanese air-raid on Pearl Harbor (Japanese did not declare war to the U.S.A, so it was absolutely unexpected). December 1941.
Explanation: