Even so, Churchill’s appointment as minister of munitions in July 1917 was made in the face of a storm of Tory protest. Excluded from the cabinet, Churchill’s role was almost entirely administrative, but his dynamic energies thrown behind the development and production of the tank (which he had initiated at the Admiralty) greatly speeded up the use of the weapon that broke through the deadlock on the Western Front. Paradoxically, it was not until the war was over that Churchill returned to a service department. In January 1919 he became secretary of war. As such he presided with surprising zeal over the cutting of military expenditure. The major preoccupation of his tenure in the War Office was, however, the Allied intervention in Russia. Churchill, passionately anti-Bolshevik, secured from a divided and loosely organized cabinet an intensification and prolongation of the British involvement beyond the wishes of any major group in Parliament or the nation—and in the face of the bitter hostility of labour. And in 1920, after the last British forces had been withdrawn, Churchill was instrumental in having arms sent to the Poles when they invaded the Ukraine.
Thus it was that the port of Dunkirk was kept open. When it was found impossible for the Armies of the north to reopen their communications to Amiens with the main French Armies, only one choice remained. It seemed, indeed, forlorn. The Belgian, British and French Armies were almost surrounded. Their sole line of retreat was to a single port and to its neighboring beaches. They were pressed on every side by heavy attacks and far outnumbered in the air.
Despite Churchill’s meticulous preparation for his speeches, he soon realized – following “a complete disaster” – that learning them by heart was not enough. In the spring of 1904, as he moved further and further away from his old Tory colleagues, his House of Commons experiences were tense and difficult. He became an increasingly isolated figure. On 22 April, making a speech in favour of improving trades union rights, he had been speaking for 45 minutes, without notes as usual, when he forgot his words. He struggled vainly for what he later called “the most embarrassing 3 minutes of my life”, trying to remember the rest of his speech, and then sat down in silence, distraught. Some believed him to be displaying early signs of the same mental decline from which his father Lord Randolph had suffered, and saw this as an appallingly public display of weakening mental faculties. His breakdown was met with jeers from some Tory members, but also with sympathy by others.

Sir Winston’s oratorical skills were world famous, and he started developing them at an early age. When he was just 23, he wrote an unpublished paper called “The Scaffolding of Rhetoric,” in which he offered five “principal elements” to win over audiences. With all due respect to Sir Winston’s estimable writing skills, I’ve taken the liberty of extending his 1897 verbiage (bolded) into modern times:
The effort was designed to match the gravity of the hour. After the Allied defeat and the evacuation of the battered British forces from Dunkirk, Churchill warned Parliament that invasion was a real risk to be met with total and confident defiance. Faced with the swift collapse of France, Churchill made repeated personal visits to the French government in an attempt to keep France in the war, culminating in the celebrated offer of Anglo-French union on June 16, 1940. When all this failed, the Battle of Britain began on July 10. Here Churchill was in his element, in the firing line—at fighter headquarters, inspecting coast defenses or antiaircraft batteries, visiting scenes of bomb damage or victims of the “blitz,” smoking his cigar, giving his V sign, or broadcasting frank reports to the nation, laced with touches of grim Churchillian humour and splashed with Churchillian rhetoric. The nation took him to its heart; he and they were one in “their finest hour.”
Against this loss of over 30,000 men, we can set a far heavier loss certainly inflicted upon the enemy. But our losses in material are enormous. We have perhaps lost one-third of the men we lost in the opening days of the battle of 21st March, 1918, but we have lost nearly as many guns — nearly one thousand-and all our transport, all the armored vehicles that were with the Army in the north. This loss will impose a further delay on the expansion of our military strength. That expansion had not been proceeding as far as we had hoped. The best of all we had to give had gone to the British Expeditionary Force, and although they had not the numbers of tanks and some articles of equipment which were desirable, they were a very well and finely equipped Army. They had the first-fruits of all that our industry had to give, and that is gone. And now here is this further delay. How long it will be, how long it will last, depends upon the exertions which we make in this Island. An effort the like of which has never been seen in our records is now being made. Work is proceeding everywhere, night and day, Sundays and week days. Capital and Labor have cast aside their interests, rights, and customs and put them into the common stock. Already the flow of munitions has leaped forward. There is no reason why we should not in a few months overtake the sudden and serious loss that has come upon us, without retarding the development of our general program.
The electoral onslaught shook Labour but left them still in office. It took what Churchill called “one more heave” to defeat them in a second election, in October 1951. Churchill again took a vigorous lead in the campaign. He pressed the government particularly hard on its handling of the crisis caused by Iran’s nationalization of British oil companies and in return had to withstand charges of warmongering. The Conservatives were returned with a narrow majority of 17, and Churchill became prime minister for the second time. He formed a government in which the more liberal Conservatives predominated, though the Liberal Party itself declined Churchill’s suggestion of office. A prominent figure in the government was R.A. Butler, the progressive-minded chancellor of the Exchequer. Anthony Eden was foreign secretary. Some notable Churchillians were included, among them Lord Cherwell, who, as paymaster general, was principal scientific adviser with special responsibilities for atomic research and development.
Therefore, when talking about the future course and conduct of the war in this speech, Churchill had to describe a great military disaster, and warn of a possible German invasion attempt, without casting doubt on eventual victory. He needed to prepare his domestic audience for France's departure from the war without in any way releasing France to do so; in his subsequent speech of 18 June immediately after the French had sued for peace Churchill said:
There is no evidence that any version of the speech, imposter or not, was broadcast on June 4, 1940. But Smithsonian writes that there are a few reasons behind the false memories. Perhaps there is a drive to remember the war in rosier terms than the actual details reveal. Or potentially people long to be part of a cultural moment, even if it didn’t exist.

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."
At the outbreak of World War II, Churchill became First Lord of the Admiralty in command of the Royal Navy. At the same time the current Prime Minister, Neville Chamberlain, wanted to appease Germany and Hitler. Churchill knew this would not work and warned the government that they needed to help fight Hitler or Hitler would soon take over all of Europe.