Neutrality Act<span> of </span>1939<span>. ... Roosevelt prevailed over the isolationists, and on November 4 the </span>Neutrality Act<span> of </span>1939<span> was </span>passed<span>, allowing for arms trade with belligerent nations (Great Britain and France) on a </span>cash-and-carry basis<span>, thus in effect ending the arms embargo.</span>