Britain had no choice but to accept the deal, but it was so much more beneficial to America than Britain that Churchill`s adviser, John Colville, compared it to the USSR`s relations with Finland. Destroyers were in reserve before the huge U.S. shipbuilding program of World War I, and many ships had to be extensively overhauled as many were not properly preserved when they were inactivated. A British admiral called them “the worst destroyers I have ever seen,” and only 30 were in service as of May 1941.  Churchill also disliked the deal, but his advisers persuaded the prime minister to simply tell Roosevelt: The United States accepted “generous action.” to improve U.S. national security” and in return immediately transferred 50 Caldwell, Wickes, and Clemson-class destroyers to the U.S. Navy, “commonly referred to as twelve hundred tons of heavy type” (also known as “flush deckers” or “four-pipers” after their four funnels). Forty-three ships first went to the British Royal Navy and seven to the Royal Canadian Navy. In commonwealth navies, ships were renamed after cities and were therefore known as the “Town” class, although they originally belonged to three classes (Caldwell, Wickes and Clemson).
Before the end of the war, nine others served in the Royal Canadian Navy. Five towns were occupied by royal Norwegian Navy crews, with the survivors later returning to the Royal Navy. HMS Campbeltown was flown by sailors of the Royal Netherlands Navy before her assignment to the Raid of Saint-Nazaire. Nine more destroyers were eventually handed over to the Soviet Navy. Six of the 50 destroyers were lost to submarines, and three others, including Campbeltown, were destroyed under different circumstances. On September 2, 1940, the United States signed an agreement to transfer 50 old destroyers to the United Kingdom in exchange for rights to four British bases in the Western Hemisphere. FDR`s escape from this dilemma took the form of a legal opinion written by its attorney general, Robert Jackson. (FDR reportedly told Jackson, perhaps jokingly, that if the legal hurdles to making the deal were not removed, Jackson`s “head must fall.”) Jackson`s opinion mixed arguments in favor of the presidency`s inherent powers with an intelligent (his critics would say “tortured”) reading of the regulations to argue that FDR could in fact complement the ground-based destructive agreement as an executive agreement.
(Jackson went out of his way to emphasize that his reasoning was not based solely on assumptions about the president`s powers.) From this perspective, the president did not need to seek congressional approval or conclude the agreement in the form of a treaty submitted to the Council and the consent of the Senate. Jackson`s opinion, however, was that the existing law prevented the president from moving twenty small PT boats to the UK. In this regard, his opinion did not mean carte blanche for the White House. In August, as Britain reached a trough, U.S. Ambassador Joseph P. Kennedy reported from London that a British capitulation was “inevitable.” To convince Roosevelt to send the destroyers, Churchill Roosevelt worrisomely warned that if Britain were defeated, its colonial islands near the U.S. coast could become a direct threat to America if they fell into German hands. The agreement was much more important to be the beginning of the Anglo-American partnership during the war.
Churchill told parliament that “these two great organizations of the English-speaking democracies, the British Empire and the United States, must be somewhat mixed in some of their affairs for mutual and general benefit.”  The agreement originated in a request made by Winston Churchill shortly after his appointment as Prime Minister in May 1940. He wrote to FDR asking for “the loan of forty or fifty of your older destroyers” to help Britain defend the English Channel against a feared German invasion. The Germans had already occupied Norway, and the day Churchill became prime minister, they attacked France and the Benelux countries. Within a month, Britain was essentially fighting alone against Germany. In August, talks between Britain and the United States shifted from a loan or sale of destroyers to an exchange of destroyers for bases in British territories in the North Atlantic and the Caribbean. Jackson discussed the destroyer-base exchange at length in the oral tradition that he harlan B. Phillips of Columbia University in 1952-1953. Below is a quote from pages 892-893. On August 13, Stimson recited that he met knox, Sumner Welles and Henry Morgenthau with the president and made a treaty proposal – that is, he outlined the essential points of an agreement. Some time before, the president had discussed with me the legal situation of whether he had the power to sell these destroyers without further approval from Congress. On August 15, I told him that we at the Department of Justice firmly believed that we had the power to act without congressional approval.
The deal was brokered in correspondence between U.S. Secretary of State Cordell Hull and the British ambassador to America. The lease was secured for a period of 99 years, “free of all rents and expenses other than such indemnities payable by mutual agreement of the United States.” On September 2, 1940, President Franklin D. Roosevelt signed the agreement on destroyers for bases. Under the terms of the agreement, the United States gave the British 50 obsolete destroyers in exchange for 99-year leases for territories in Newfoundland and the Caribbean. The territories were to be used as air and naval bases for the United States. Significant legal obstacles made the agreement more difficult. Attorney General Robert H. Jackson and his colleagues spent much of the summer of 1940 solving some of these problems.
Jackson`s acquisition of naval and air bases in exchange for obsolete destroyers was unveiled on August 27, 1940. Commonly referred to as the “twelve hundred ton type” (also known as the “flush bridge” or “four bagpipes” after its four funnels), the destroyers became the British Town class and were named after common cities in the United States and the United Kingdom.  Roosevelt used an executive agreement that did not require congressional approval, but it was violently attacked by anti-war political elements. The agreement violated neutrality laws.  A World War II agreement between F. D. Roosevelt and Churchill. Known as the Destroyer Transfer Agreement, it transferred 50 much-needed destroyers to the United Kingdom in exchange for leasing British bases in the West Indies, Newfoundland, and British Guiana.
As they were designed by the First World War, destroyers became superfluous for British needs during the war, but at the beginning and in the critical phase of the Second World War, they were an invaluable addition to the available escort ships. . American and British sailors studied deep charges. In the background are the American Wickes-class destroyers before their transfer According to the 1907 Hague Convention, the agreement was not compatible with the “neutrality” of the United States and could therefore have been used by the Axis powers as casus belli for a declaration of war on the United States. [Citation needed] Roosevelt responded by transferring ten Lake-class cutters from the Coast Guard to the Royal Navy in 1941. These U.S. Coast Guard ships were ten years newer than destroyers and had a longer range, making them more useful as escorts for anti-submarine convoys.  Churchill`s advocacy helped persuade FDR to act. After a crucial cabinet meeting on August 2, the president wrote: “It was the general view, without any dissenting voices, that the survival of the British Isles under German attack could most likely depend on obtaining these destroyers. It was agreed that legislation is needed to achieve this. As the war shifted from a “fake war” to a full-blown war on the Western Front, Britain`s need for help continued to grow.
President Roosevelt had no problem selling arms, ammunition, and planes to Britain (since the United States produced these resources in sufficient numbers). Churchill insisted, however, that his greatest need was to make destroyers to protect British convoys from submarine attacks. Supplying Britain with destroyers was a particularly annoying problem for Roosevelt. The United States had stockpiled 200 World War I-era destroyers, 176 of which had just been refurbished and recommissioned. Certainly, the United States could save 50 ships. However, the most recent appropriation law included a clause stating that weapons could only be supplied if the head of the service could claim that the U.S. armed forces did not need them. Since the chief of naval operations had recently testified to the importance of these destroyers to obtain money for their conversion. The head of the Navy clearly could not declare these ships superfluous.