Lend-Lease in the context of "Harry Hopkins"

The third presidential term of Franklin D. Roosevelt began on January 20, 1941, when he was once again inaugurated as the 32nd president of the United States, and the fourth term of his presidency ended with his death on April 12, 1945. Roosevelt won a third term by defeating Republican nominee Wendell Willkie in the 1940 presidential election. He remains the only president to serve for more than two terms. Unlike his first two terms, Roosevelt's third and fourth terms were dominated by foreign policy concerns, as the United States became involved in World War II in December 1941.

Roosevelt won congressional approval of the Lend-Lease program, which was designed to aid the United Kingdom in its war against Nazi Germany, while the U.S. remained officially neutral. After Germany began war against the Soviet Union in June 1941, Roosevelt extended Lend-Lease to the Soviet Union as well. In Asia, Roosevelt provided aid to the Republic of China, which was resisting an invasion by the Empire of Japan. In response to the July 1941 Japanese occupation of French Indochina, Roosevelt expanded a trade embargo to cut off oil that Japan urgently needed for its fleet. When Roosevelt refused to end the embargo, on December 7, 1941, Japan launched an attack on the U.S. fleet stationed at Pearl Harbor in Hawaii. Isolationist sentiment in the U.S. immediately collapsed and Congress declared war on Japan. After Germany declared war on the U.S., Congress declared war on Germany and Italy. To win the war, the U.S., Britain and the Soviet Union assembled a large coalition of the Allies. The U.S. funded much of the war efforts of the other allies, and supplied munitions, food, and oil. In consultation with his Army and Navy and British Prime Minister Winston Churchill, Roosevelt decided on a Europe first strategy, which focused on defeating Germany before Japan. In practice, however, in 1942 and 1943 the U.S. focused on fighting Japan.

The M4 Sherman, officially Medium Tank, M4, was the medium tank most widely used by the United States and Western Allies in World War II. The M4 Sherman proved to be reliable, relatively cheap to produce, and available in great numbers. It was also the basis of several other armored fighting vehicles including self-propelled artillery, tank destroyers, and armored recovery vehicles. Tens of thousands were distributed through the Lend-Lease program to the British Commonwealth, Soviet Union, and other Allied Nations. The tank was named by the British after the American Civil War General William Tecumseh Sherman.

The M4 Sherman tank evolved from the M3 Lee, a medium tank developed by the United States during the early years of World War II. Despite the M3's effectiveness, the tank's unconventional layout and the limitations of its hull-mounted gun prompted the need for a more efficient and versatile design, leading to the development of the M4 Sherman.

The Army Service Forces was one of the three autonomous components of the United States Army during World War II, the others being the Army Air Forces and Army Ground Forces, created on 9 March 1942. By dividing the Army into three large commands, the Chief of Staff, General George C. Marshall, drastically reduced the number of officers and agencies reporting directly to him. The Army Service Forces brought together elements of five different components of the Army: elements of the War Department General Staff (WDGS), especially its G-4 division (responsible for logistics); the Office of the Under Secretary of War; the eight administrative bureaus; the nine corps areas, which became service commands; and the six supply arms and services, which became known as the technical services. The Army Service Forces was initially known as the United States Army Services of Supply but the name was changed on 12 March 1943, as it was felt that the term "supply" did not accurately describe the broad range of its activities. The Army Service Forces was abolished on 11 June 1946 and most of its functions were taken over by the War Department General Staff.

For most of its existence, the Army Service Forces was commanded by General Brehon B. Somervell, with Lieutenant General Wilhelm D. Styer as his chief of staff. After Styer left for the Pacific, he was succeeded by Major General LeRoy Lutes on 18 April 1945. Brigadier General Lucius D. Clay was the Deputy Chief of Staff for Requirements and Resources, and as such he was responsible for the development of the Army Supply Program, the operation of the Lend-Lease program, and liaison with the War Production Board concerning the allocation of raw materials. Although he had his own logistics staff in the G-4 division of the War Department General Staff, it was to Somervell and Styer that Marshall turned to for advice on logistical matters, and it was Somervell who attended the important wartime conferences.

The military history of the United States during World War II covers the nation's role as one of the major Allies in their victory over the Axis powers. The United States is generally considered to have entered the conflict with the 7 December 1941 surprise attack on Pearl Harbor by Japan and exited it with the surrender of Japan on 2 September 1945. During the first two years of World War II, the U.S. maintained formal neutrality, which was officially announced in the Quarantine Speech delivered by President Franklin D. Roosevelt in 1937. While officially neutral, the U.S. supplied Britain, the Soviet Union, and China with war materiel through the Lend-Lease Act signed into law on 11 March 1941, and deployed the U.S. military to replace the British forces stationed in Iceland. Following the 4 September 1941 Greer incident involving a German submarine, Roosevelt publicly confirmed a "shoot on sight" order on 11 September, effectively declaring naval war on Germany and Italy in the Battle of the Atlantic. In the Pacific Theater, there was unofficial early US combat activity such as the Flying Tigers.

During the war, some 16,112,566 Americans served in the United States Armed Forces, with 407,316 killed and 671,278 wounded. According to the US Department of Defense, of the 407,316 dead, about 250,000 were killed in the European theater, the remaining 160,000 died in the Pacific War. There were also 130,201 American prisoners of war, of whom 116,129 returned home after the war. Key civilian advisors to President Roosevelt included Secretary of War Henry L. Stimson, who mobilized the nation's industries and induction centers to supply the U.S. Army, commanded by General George C. Marshall and the Army Air Forces under General Henry H. Arnold. The U.S. Navy, led by Secretary of the Navy Frank Knox and Admiral Ernest J. King, proved more autonomous. Overall priorities were set by Roosevelt and the Joint Chiefs of Staff, chaired by William D. Leahy. The defeat of the Nazis was the U.S.'s official highest priority per its agreement with Britain; however, in practice, the US devoted more resources to the Pacific than Europe and Africa until 1944.

Henry Morgenthau Jr. (/ˈmɔːrɡənθɔː/; May 11, 1891 – February 6, 1967) was the United States Secretary of the Treasury during most of the administration of Franklin D. Roosevelt. He played a major role in designing and financing the New Deal. After 1937, while still in charge of the Treasury, he played the central role in financing the United States participation in World War II. He also played an increasingly major role in shaping foreign policy, especially with respect to Lend-Lease, support for China, helping Jewish refugees, and proposing (in the "Morgenthau Plan") measures to deindustrialize Germany.

Morgenthau was the father of Robert M. Morgenthau, who was district attorney of Manhattan for 35 years; Henry Morgenthau III, an American author and television producer; and noted pediatrician Dr. Joan Morganthau Hirschhorn. He continued as Treasury secretary through the first few months of Harry Truman's presidency, and from June 27, 1945, to July 3, 1945, following the resignation of Secretary of State Edward Stettinius Jr., was next in line to the presidency. Morgenthau was the only Jew to be next in line to the presidency in the presidential line of succession.

The United States provided tens of thousands of its Medium Tank M4, also named the Sherman, to many of its Allies during the Second World War, under the terms of Lend-Lease.

After the Munich Agreement, the Soviet Union pursued a rapprochement with Nazi Germany. On 23 August 1939, the Soviet Union signed a non-aggression pact with Germany which included a secret protocol that divided Eastern Europe into German and Soviet spheres of influence, anticipating potential "territorial and political rearrangements" of these countries. Germany invaded Poland on 1 September 1939, starting World War II. The Soviets invaded eastern Poland on 17 September. Following the Winter War with Finland, the Soviets were ceded territories by Finland. This was followed by annexations of the Baltic states and parts of Romania.

On 22 June 1941, Adolf Hitler launched Operation Barbarossa, an invasion of the Soviet Union with the largest invasion force in history, resulting in large battles and horrific atrocities. This offensive comprised three army groups. The city of Leningrad was besieged while other major cities fell to the Germans. Despite initial successes, the German offensive ground to a halt in the Battle of Moscow, and the Soviets launched a counteroffensive, pushing the Germans back. The failure of Operation Barbarossa reversed the fortunes of Germany, and Stalin was confident that the Allied war machine would eventually defeat Germany. The Soviet Union repulsed Axis attacks, such as in the Battle of Stalingrad and the Battle of Kursk, which marked a turning point in the war. The Western Allies provided support to the Soviets in the form of Lend-Lease as well as air and naval support. Stalin met with Winston Churchill and Franklin D. Roosevelt at the Tehran Conference and discussed a two-front war against Germany and the future of Europe after the war. The Soviets launched successful offensives to regain territorial losses and began a push to Berlin. The Germans unconditionally surrendered in May 1945 after Berlin fell.

United States non-interventionism primarily refers to the foreign policy that was eventually applied by the United States between the late 18th century and the first half of the 20th century whereby it sought to avoid alliances with other nations in order to prevent itself from being drawn into wars that were not related to the direct territorial self-defense of the United States. Neutrality and non-interventionism found support among elite and popular opinion in the United States, which varied depending on the international context and the country's interests. At times, the degree and nature of this policy was better known as isolationism, such as the interwar period, while some consider the term isolationism to be a pejorative used to discredit non-interventionist policy.

It is key to decipher between the terms isolationism and non-interventionism as they represent two distinct types of foreign policy. Isolationism is the act of completely disengaging from any global affairs such as military alliances, international organisations and economic treaties. Whereas, non-interventionism although also opposed to military engagement, there was still room for diplomatic and economic relations with the rest of the world. This can be seen during the build up to World War II, where non-interventionists opposed direct military involvement in Europe whilst supporting them with economic aid such as the Lend Lease Act.