The positive effects of getting California is that it's closer to Asia, and California side of the nation at the time could have open territory to conquer.
B because they did not want another one like that to happen; they didn’t want enslaved people to gain any form of power
People think that it is a war that we should have not fought because we didn’t win, many soldiers were killed, and south Vietnam’s became communist after the 20 year war.
The Cold War Containment policy was a complete bust because we pour money into failing countries so they there economy was strong enough to where they wouldn't have radical thoughts of communism this was referred to as the Truman doctrine and then the Eisenhower doctrine that funded the middle east. Then we went into the police action "war" in Korea so that the domino effect wouldn't allow other nations to fall to communism