How did lessons learned from world war 2 influences president Truman's decision to send troops to aid south Korea after north Korea invaded?

Answer 1

In World War II, the Allies appeased Hitler when he began invading surrounding countries and allowed him to gain power before war was declared on Germany, leading to a horrific and drawn out war. Truman did not want to make the same mistake and allow North Korea to cause immense damage due to his failure to act soon enough.