Churchill had declined a steady stream of high-profile speaking invitations in the first months after the war, including those from the kings and queens of Norway, Denmark, and Holland, as well as from Canada and Australia. “I refuse,” said Churchill, “to be exhibited like a prize bull whose chief attraction is his past prowess.” But Churchill could hardly turn down an invitation than came from the White House in September 1945. Churchill opened it and saw that it was an invitation to speak at Westminster College in a town he had never heard of. Scoffing, he threw it down and said, “I supposed colleges in America are too named ‘Parliament.’” But his daughter Sarah read it and saw that there was a postscript at the bottom of the invitation. “This is a wonderful school in my home state. Hope you can do it. I’ll introduce you. s/g Harry Truman.”
On June 18, 1940, Churchill attempted to lift up England following the fall of France and the successful evacuation of most of England’s supporting forces from the continent. At the moment of great apparent danger to British national survival, he spoke not only of endurance but of noble causes of which Britain was fighting (freedom, Christian civilization, the rights of small nations): “Let us therefore brace ourselves to our duties, and so bear ourselves, that if the British Empire and its Commonwealth last for a thousand years, men will still say, ‘This was their finest hour.’” The speech lasted thirty-six minutes. The final passage of his typescript was laid out in blank verse format, which historians believe shows the influence of the Old Testament psalms on Churchill’s oratorical style.

In this speech, Churchill had to describe a great military disaster, and warn of a possible invasion attempt by the Nazis, without casting doubt on eventual victory. He also had to prepare his domestic audience for France's falling out of the war without in any way releasing France to do so, and wished to reiterate a policy and an aim unchanged – despite the intervening events – from his speech of 13 May, in which he had declared the goal of "victory, however long and hard the road may be".

The Churchill wilderness years have been likened to the Biblical prophet Jeremiah, who pleaded in the desert for the people of Israel to change their ways. Others compare him to Cassandra, the prophetess of Troy whom Apollo cursed with always being unheeded. The best comparison is that of the Athenian orator Demosthenes, who wielded his rhetorical gifts to warn of the military threat from Philip II of Macedon. The Athenians ignored Demosthenes’ “philippics” until war was upon them.
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.
We shall not flag or fail. We shall go on to the end, we shall fight in France, we shall fight on the seas and oceans, we shall fight with growing confidence and growing strength in the air, we shall defend our Island, whatever the cost may be, we shall fight on the beaches, we shall fight on the landing grounds, we shall fight in the fields and in the streets, we shall fight in the hills; we shall never surrender, and even if, which I do not for a moment believe, this Island or a large part of it were subjugated and starving, then our Empire beyond the seas, armed and guarded by the British Fleet, would carry on the struggle, until, in God's good time, the New World, with all its power and might, steps forth to the rescue and the liberation of the Old.
Upon this battle depends the survival of Christian civilisation. Upon it depends our own British life and the long continuity of our institutions and our Empire. The whole fury and might of the enemy must very soon be turned on us now. Hitler knows that he will have to break us in this island or lose the war. If we can stand up to him, all Europe may be free and the life of the world may move forward into broad, sunlit uplands. But if we fail, then the whole world, including the United States, including all that we have known and cared for, will sink into the abyss of a new Dark Age, made more sinister, and perhaps more protracted, by the lights of perverted science. Let us therefore brace ourselves to our duties, and so bear ourselves that, if the British Empire and its Commonwealth last for a thousand years, men will still say, 'This was their finest hour.'
While largely unstated, one of Churchill’s major concerns was limiting Soviet territorial gains in Europe. Having an eye toward the postwar world, he did not want Stalin in control of formerly democratic nations. However, geopolitics required further cooperation with his unlikely ally, and Churchill met Roosevelt for the last time in Stalin’s domain—Yalta in the Crimea, in February 1945. Victory in Europe was visible by then, though with more hard fighting to come in the Pacific. Roosevelt’s premature death in April ended the original Big Three.

Churchill Speeches