From 1915 the US made tons of loans to the UK to help them in their war effort. It is not a stretch to say that WWI was the major factor in contributing to the "Roaring 20s" when the US economy boomed. ... The long term effect was that US involvement in the war lead directly to the Great Depression and WWII.Nov 4, 2013
When the war began, the U.S. economy was in recession. But a 44-month economic boom ensued from 1914 to 1918, first as Europeans began purchasing U.S. goods for the war and later as the United States itself joined the battle. "The long period of U.S. neutrality made the ultimate conversion of the economy to a wartime basis easier than it otherwise would have been," writes Rockoff. "Real plant and equipment were added, and because they were added in response to demands from other countries already at war, they were added precisely in those sectors where they would be needed once the U.S. entered the war."
Well it is the Korean war.
So: South and North Korea would be right. The US was a part of it and so was China.
They needed slaves in the military. They needed free labor because there was a lack of it until they used slavery. And religious purpose turning them Christian.
Question 2 is responsibilities of citizens i cant spell sorry