Churchill’s “Iron Curtain” speech at Fulton, Missouri, on March 5, 1946, ranks as one of the most famous and consequential speeches ever made by someone out of high office, comparable in its force to Lincoln’s “House Divided” speech of 1858 and Martin Luther King’s “I Have a Dream” speech of 1963. It is remembered as the announcement to the world of the beginning of the Cold War, although as Churchill knew the seeds had been germinating for some time. It crystallized the new situation facing the United States and Western democracies and also forecast how the new and unusual “cold” war should be conducted so as to avoid World War III and achieve a peaceful future.

During the first four years of the last war the Allies experienced nothing but disaster and disappointment. That was our constant fear: one blow after another, terrible losses, frightful dangers. Everything miscarried. And yet at the end of those four years the morale of the Allies was higher than that of the Germans, who had moved from one aggressive triumph to another, and who stood everywhere triumphant invaders of the lands into which they had broken. During that war we repeatedly asked ourselves the question: 'How are we going to win?' And no one was able ever to answer it with much precision, until at the end, quite suddenly, quite unexpectedly, our terrible foe collapsed before us, and we were so glutted with victory that in our folly we threw it away.
The Admiralty had demanded six ships: the economists offered four: and we finally compromised on eight.” Churchill believed that Germany was badly overextending itself, having doubled its national debt over the previous ten years. Germany was rapidly approaching its limits, he thought, though he allowed for the possibility that it might pursue foreign adventurism as an answer for its economic problems. In a memorandum to the cabinet in 1909, Churchill mused, “ . . . a period of internal strain approaches in Germany. Will the tension be relieved by moderation or snapped by calculated violence? . . . . [O]ne of the two courses must be taken soon.” This was, Churchill wrote later in The World Crisis, “the first sinister impression that I was ever led to record.”

While Churchill is often credited with having originated the phrase “iron curtain,” he may, ironically enough, have gotten the term from Count Schwerin von Krosigk, the foreign minister of Germany in the last days of the war, who, the Times reported, had warned in a radio broadcast a few days before VE Day, “In the East the iron curtain behind which, unseen by the eyes of the world, the work of destruction goes on, is moving steadily forward.”

I have said this armored scythe-stroke almost reached Dunkirk-almost but not quite. Boulogne and Calais were the scenes of desperate fighting. The Guards defended Boulogne for a while and were then withdrawn by orders from this country. The Rifle Brigade, the 60th Rifles, and the Queen Victoria’s Rifles, with a battalion of British tanks and 1,000 Frenchmen, in all about four thousand strong, defended Calais to the last. The British Brigadier was given an hour to surrender. He spurned the offer, and four days of intense street fighting passed before silence reigned over Calais, which marked the end of a memorable resistance. Only 30 unwounded survivors were brought off by the Navy, and we do not know the fate of their comrades. Their sacrifice, however, was not in vain. At least two armored divisions, which otherwise would have been turned against the British Expeditionary Force, had to be sent to overcome them. They have added another page to the glories of the light divisions, and the time gained enabled the Graveline water lines to be flooded and to be held by the French troops.

He justified the low level of support it had been possible to give to France since Dunkirk, and reported the successful evacuation of most of the supporting forces. He resisted pressure to purge the coalition of appeasers, or otherwise indulge in recrimination. He reviewed the forces still available to prevent or repel any attempted invasion,[b] summing up the review as follows:
As the Allies were learning details of the Nazis' ongoing mass-murder program taking place at the Auschwitz death camp, the greatest Anglo-American action of World War II began: the cross-Channel airborne and amphibious attack known as "D-Day." Churchill enthusiastically supported this operation, long-advocated by the Americans, after some initial hesitation and despite his hopes for an Italian campaign. On June 6, 1944, the Allied Expeditionary Forces landed more than 150,000 British, Canadian, and American troops on the Normandy coast. The invasion, which was code-named "OVERLORD," marked the opening of the final drive to defeat German forces in northwestern Europe. A number of deception measures, outlined by Churchill at the Teheran Conference, helped make D-Day a success. The most important of these was "FORTITUDE SOUTH," the creation of a phantom group of armies that supposedly were to invade the European mainland after the actual Normandy landings. These measures were greatly assisted by the use of highly secret ULTRA intelligence, generated by the British from deciphered radio communications. Related Objects

The Japanese attack on Pearl Harbor (December 7, 1941) altered, in Churchill’s eyes, the whole prospect of the war. He went at once to Washington, D.C., and, with Roosevelt, hammered out a set of Anglo-American accords: the pooling of both countries’ military and economic resources under combined boards and a combined chiefs of staff; the establishment of unity of command in all theatres of war; and agreement on the basic strategy that the defeat of Germany should have priority over the defeat of Japan. The grand alliance had now come into being. Churchill could claim to be its principal architect. Safeguarding it was the primary concern of his next three and a half years.

We ask no favours of the enemy. We seek from them no compunction. On the contrary, if tonight the people of London were asked to cast their votes as to whether a convention should be entered into to stop the bombing of all cities, an overwhelming majority would cry, "No, we will mete out to the Germans the measure, and more than the measure, they have meted out to us." The people of London with one voice would say to Hitler: "You have committed every crime under the sun. Where you have been the least resisted there you have been the most brutal. It was you who began the indiscriminate bombing. We remember Warsaw! In the first few days of the war. We remember Rotterdam. We have been newly reminded of your habits by the hideous massacre in Belgrade. We know too well the bestial assaults you're making upon the Russian people, to whom our hearts go out in their valiant struggle! We will have no truce or parley with you, or the grisly gang who work your wicked will! You do your worst! - and we will do our best! Perhaps it may be our turn soon. Perhaps it may be our turn now."
This might be regarded as Churchill’s farewell address to the House of Commons and established Britain’s approach to nuclear weapons. Churchill, wary of nuclear weaponry, set out to warn the House of their destructive power. He even flirts with the idea of disarmament, but rules it out owning to the international context of the Cold War. He paints a grim picture of the effects of the Hydrogen bomb, but then abruptly changes tone. The Churchillian optimism shrines through in his conclusion:

An introduction by the president of the United States would afford Churchill a world stage—whatever the venue. Though the date of the address, March 5, 1946, was half a year away, the opportunity fueled his imagination. He may have been out of office, but he was still the world’s foremost political figure, a man whose words could still command attention in the world’s leading nation. The thought buoyed his spirit, as he resumed his role of Leader of the Opposition.

This brings me, naturally, to the great question of invasion from the air, and of the impending struggle between the British and German Air Forces. It seems quite clear that no invasion on a scale beyond the capacity of our land forces to crush speedily is likely to take place from the air until our Air Force has been definitely overpowered. In the meantime, there may be raids by parachute troops and attempted descents of airborne soldiers. We should be able to give those gentry a warm reception both in the air and on the ground, if they reach it in any condition to continue the dispute. But the great question is: Can we break Hitler's air weapon? Now, of course, it is a very great pity that we have not got an Air Force at least equal to that of the most powerful enemy within striking distance of these shores. But we have a very powerful Air Force which has proved itself far superior in quality, both in men and in many types of machine, to what we have met so far in the numerous and fierce air battles which have been fought with the Germans. In France, where we were at a considerable disadvantage and lost many machines on the ground when they were standing round the aerodromes, we were accustomed to inflict in the air losses of as much as two and two-and-a-half to one. In the fighting over Dunkirk, which was a sort of no-man's-land, we undoubtedly beat the German Air Force, and gained the mastery of the local air, inflicting here a loss of three or four to one day after day. Anyone who looks at the photographs which were published a week or so ago of the re-embarkation, showing the masses of troops assembled on the beach and forming an ideal target for hours at a time, must realize that this re-embarkation would not have been possible unless the enemy had resigned all hope of recovering air superiority at that time and at that place.
But the escalating situation in Europe was getting hard to ignore. Churchill rose to the Prime Ministry on May 10, 1940, coinciding with the end of the so-called “Phoney War,” a period stretching from September 1939, with the declaration of war against Germany, to the spring of 1940, a period with no major military land operations on the European continent. That stagnation ceased after the Nazis invaded Denmark and Norway in April. The Battle of Dunkirk -- which would incur heavy Allied casualties, prompt a Belgian surrender, and precipitate the fall of France -- commenced in May.
Reference:  Speech to a joint session of the United States Congress, Washington, D.C. (December 26, 1941); reported in Winston S. Churchill: His Complete Speeches, 1897–1963, ed. Robert Rhodes James (1974), vol. 6, p. 6541. The Congressional Record reports that this speech was followed by "Prolonged applause, the Members of the Senate and their guests rising"; Congressional Record, vol. 87, p. 10119.

However, the German eruption swept like a sharp scythe around the right and rear of the Armies of the north. Eight or nine armored divisions, each of about four hundred armored vehicles of different kinds, but carefully assorted to be complementary and divisible into small self-contained units, cut off all communications between us and the main French Armies. It severed our own communications for food and ammunition, which ran first to Amiens and afterwards through Abbeville, and it shore its way up the coast to Boulogne and Calais, and almost to Dunkirk. Behind this armored and mechanized onslaught came a number of German divisions in lorries, and behind them again there plodded comparatively slowly the dull brute mass of the ordinary German Army and German people, always so ready to be led to the trampling down in other lands of liberties and comforts which they have never known in their own.
Churchill’s speech in Zurich calling for “a kind of United States in Europe” remains one of his most prophetic statements. Perhaps even more controversial - especially in 1946 - was his claim that the “first step in the re-creation of the European family must be a partnership between France and Germany”. In 1951, the treaty of Paris was signed creating European Coal and Steel Community which became a foundation block for the modern EU.

The following year was equally crucial, witnessing Germany’s attack on Russia and America’s entry into the war. Churchill had already established a warm relationship with President Franklin Roosevelt and put aside an instinctive dislike and distrust for Soviet premier Joseph Stalin. Churchill, a firm anticommunist, knew Stalin for what he was—unlike Roosevelt, who consistently made allowances for the Soviet dictator, fondly calling the genocidal despot ‘‘Uncle Joe.’’ Despite their personal and national differences with respect to communist Russia, Churchill and Roosevelt remained staunch allies throughout the war. They quickly decided on a ‘‘Germany first’’ strategy, but in early 1942 the main threat was from Japan, which was rolling up easy victories in the Philippines, Singapore, and Malaya.

Churchill Speech