America VS Japan this was important because this was war. We learned a lot from this this war we could of gone without it in our history but yea. Also we learned about the atomic bomb that destroyed a city in Japan. We shouldn't of used that bomb to destroy that city but know we know to know. So we learned what's important in war and what's not important.
The Civil war
This stopped slavery for america. Abe Lincoln wanted to stop slavery because all men had equal. They had to go to war. Without this war America wouldn't be America. The northern and southern parts of america would of split up if america would of loss this war. So that's why it's so important.
911
Terrorist attacked america a air plane heading straight