For those in the industrial sector, organized labor unions fought for better wages, reasonable hours and safer working conditions. The labor movement led efforts to stop child labor, give health benefits and provide aid to workers who were injured or retired.
Answer:
The league was established at the end of world war 1 as an international peacekeeping
I think it was the Indian removal act of 1830
One of the main goals of the Americanization movement during the Progressive Era was to "make immigrants more loyal and moral citizens", since there was still a great deal of anti-immigrant sentiment during this time.
1. General MacArthur had a successful surprise attack launched on the North Korean army at Inchon, which was west of the Korean Peninsula. When he met with Truman face to face at Wake Island, he publicly accused the president of "appeasement" regarding China. Instead of following Truman's orders, MacArthur did things his way. He thought that the Chinese would not join in the war, so he assured Truman that the Chinese army would not take part in the war when the UN forces reach the Yalu River, the border between China and North Korea. MacArthur was so confident in his success that he promised American troops would be home for Christmas.
2. President Truman assigned General MacArthur as leader of the UN troops. Truman's overall objective was to create harmony between North and South Korea as soon as possible. He was concerned of the Chinese army joining in the war in favor of North Korea, but MacArthur assured him that the Chinese would not interfere when they reach the Yalu River; however, he was wrong. Because MacArthur disobeyed the orders, Truman relieved MacArthur of his position.
3 and 4 are based on your own opinions, so I cannot answer that part. Otherwise, hope this helps a little though it is not much.