At the time of Hitlers 1939 invasion of Poland the US had a policy of?

At the time of Hitler's 1939 invasion of Poland, the United States had a policy of isolationism. This approach was characterized by a reluctance to become involved in European conflicts and a focus on domestic issues. The U.S. maintained neutrality and avoided direct military engagement, influenced by the widespread desire to prevent another devastating war like World War I. It wasn't until later, particularly after the attack on Pearl Harbor in 1941, that the U.S. shifted its stance and entered World War II.