Final answer:
The U.S. foreign policy changed drastically leading up to World War II, with milestones including the Non-interventionist stance, Lend-Lease Act, Atlantic Charter, and Pearl Harbor.
Step-by-step explanation:
Between the passage of the first Neutrality Acts in 1935 and a virtual alliance with Great Britain and even the Soviet Union by 1941, U.S. foreign policy changed drastically. Four milestones of these changes were the Non-interventionist stance, Lend-Lease Act, Atlantic Charter, and Pearl Harbor. The Non-interventionist stance reflected the U.S. desire to avoid getting involved in foreign conflicts. The Lend-Lease Act allowed the U.S. to provide military aid to countries fighting against the Axis powers. The Atlantic Charter laid out the goals for a post-war world based on democracy and human rights. Pearl Harbor, a surprise attack by Japan on the U.S. naval base, led to America's entry into World War II.