In the 1930s, Congress watched the expanding war in Europe with concern. Many in Congress did not want to become involved in another European war, preferring to remain neutral. Some of these legislators thought that American foreign policy should be directed toward keeping America isolated from the conflicts abroad. President Franklin Roosevelt did not agree with the policy of isolation, or restraint from involvement in foreign affairs, particularly wars. The Neutrality Acts of 1935 and of 1937, written with the intent to keep America safe when other nations were at war, prevented American industry from selling weapons and ammunition to nations involved in war. The idea was that by not selling arms to any side involved in a war, America could remain neutral and continue to trade non–military products with both sides.