Churchill was back in the cabinet by mid-1917 and finished the war as minister of munitions. He opposed postwar accommodations with Indian separatists such as Gandhi and was involved in other international affairs as colonial secretary, including establishment of the Iraqi nation in 1921. Over the next several years he was in and out of Parliament and government, earning an exceptional living from writing.
He had been in the habit of totally memorising his speeches. But from this point forward, Churchill decided to forge a system of speech writing that employed copious notes and several revisions. It was this system which helped create the powerful and awe inspiring oratory which Churchill had envisioned as a 23-year-old in 'The Scaffolding of Rhetoric’ and for which Churchill has become famous. So in many ways, it was from this small failure that day in the House of Commons that Churchill’s amazing oratory was born. 

In Miami, Churchill completed his first draft, writing mostly on the sunny terrace outside the living room. During his stay, he spoke on the need for Anglo-American unity at the University of Miami, where, after receiving his honorary doctorate, he made this comment: “Perhaps no one has ever passed so few examinations and received so many degrees.”
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.”
Lest the account which I have given of these large forces should raise the question: Why did they not take part in the great battle in France? I must make it clear that, apart from the divisions training and organizing at home, only twelve divisions were equipped to fight upon a scale which justified their being sent abroad. And this was fully up to the number which the French had been led to expect would be available in France at the ninth month of the war. The rest of our forces at home have a fighting value for home defense which will, of course, steadily increase every week that passes. Thus, the invasion of Great Britain would at this time require the transportation across the sea of hostile armies on a very large scale, and after they had been so transported they would have to be continually maintained with all the masses of munitions and supplies which are required for continuous battle--as continuous battle it will surely be.
In 1900 he entered politics as Conservative Member of Parliament for Oldham. However, he disagreed with his party over the issue of free trade and social reform and in 1904 became a member of the Liberal party. In the 1906 General Election he was elected as Member of Parliament for Manchester North-West. In 1908 he joined the cabinet as President of the Board of Trade and set up Labour Exchanges to help the unemployed find work. He also introduced a minimum wage.
I have, myself, full confidence that if all do their duty, if nothing is neglected, and if the best arrangements are made, as they are being made, we shall prove ourselves once again able to defend our Island home, to ride out the storm of war, and to outlive the menace of tyranny, if necessary for years, if necessary alone. At any rate, that is what we are going to try to do. That is the resolve of His Majesty’s Government-every man of them. That is the will of Parliament and the nation. The British Empire and the French Republic, linked together in their cause and in their need, will defend to the death their native soil, aiding each other like good comrades to the utmost of their strength. Even though large tracts of Europe and many old and famous States have fallen or may fall into the grip of the Gestapo and all the odious apparatus of Nazi rule, 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.

The speech takes on an inexorable rhythm, which coupled with the use of repetition, acquires a kind of imperial power reminiscent of Shakespeare. The extraordinary potency of these words transformed the nation. It filled everyone who heard it with faith and conviction, and it enabled our small island to withstand pure evil. It somehow reaches into the very soul of England and calls up that lion spirit which lies dormant within every English heart.
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.
The Churchill Estate (as well as British Institutions like BBC, British Library and British Pathe that don't allow downloads) are extremely possessive of archive material. There is a substantial amount of British pre-1950 spoken word recordings from the arts, to politicians to royalty - nearly all were put onto 78s for public consumption, so it's OUR heritage. Yet there's no single accessible source for them - they're spread all over the place, so it's good that these Churchill recordings, at least, are freely available.
Therefore, it seems to me that as far as sea-borne invasion on a great scale is concerned, we are far more capable of meeting it today than we were at many periods in the last war and during the early months of this war, before our other troops were trained, and while the B.E.F. had proceeded abroad. Now, the Navy have never pretended to be able to prevent raids by bodies of 5,000 or 10,000 men flung suddenly across and thrown ashore at several points on the coast some dark night or foggy morning. The efficacy of sea power, especially under modern conditions, depends upon the invading force being of large size; It has to be of large size, in view of our military strength, to be of any use. If it is of large size, then the Navy have something they can find and meet and, as it were, bite on. Now, we must remember that even five divisions, however lightly equipped, would require 200 to 250 ships, and with modern air reconnaissance and photography it would not be easy to collect such an armada, marshal it, and conduct it across the sea without any powerful naval forces to escort it; and there would be very great possibilities, to put it mildly, that this armada would be intercepted long before it reached the coast, and all the men drowned in the sea or, at the worst blown to pieces with their equipment while they were trying to land. We also have a great system of minefields, recently strongly reinforced, through which we alone know the channels. If the enemy tries to sweep passages through these minefields, it will be the task of the Navy to destroy the mine-sweepers and any other forces employed to protect them. There should be no difficulty in this, owing to our great superiority at sea.

By repeating “we shall” ten times as a mantra, Sir Winston was employing a rhetorical device that originated with the classical Greek orators and continues to be used to the present day. In a prior Forbes post, I wrote about how Emma Gonzalez, a teenage survivor of the Florida high school shooting, rocketed to media fame with a speech using the same technique.
78 rpm: Gramophone (C3223-5) [issued as part of Gramophone Album “The Progress of the War”, Vol. Two, No. 356] BBC, Royal Air Force Benevolent Fund of U.S.A., Hear It Now I; 33 rpm: EMI/Odeon 4, Decca 8, London XL.9, Hear It Now I, World Record Club EZ.1026, I Can Hear It Now ML 5066/KL 5066, Caedmon TC 2018, Decca LXT 6200; Tape: Decca KSXC 6200, Argo 1118; CD: BBC Audiobooks, This England, ProArte
If Hitler can bring under his despotic control the industries of the countries he has conquered, this will add greatly to his already vast armament output. On the other hand, this will not happen immediately, and we are now assured of immense, continuous and increasing support in supplies and munitions of all kinds from the United States; and especially of aeroplanes and pilots from the Dominions and across the oceans coming from regions which are beyond the reach of enemy bombers.
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:

In the autumn of 1922 the insurgent Turks appeared to be moving toward a forcible reoccupation of the Dardanelles neutral zone, which was protected by a small British force at Chanak (now Çanakkale). Churchill was foremost in urging a firm stand against them, but the handling of the issue by the cabinet gave the public impression that a major war was being risked for an inadequate cause and on insufficient consideration. A political debacle ensued that brought the shaky coalition government down in ruins, with Churchill as one of the worst casualties. Gripped by a sudden attack of appendicitis, he was not able to appear in public until two days before the election, and then only in a wheelchair. He was defeated humiliatingly by more than 10,000 votes. He thus found himself, as he said, all at once “without an office, without a seat, without a party, and even without an appendix.”
As a twenty-six-year old, Churchill took his seat as a Conservative member in the new Parliament and four days later made his maiden speech. He spoke immediately following Lloyd George, ensuring the young politician a very full house. Churchill had, of course, prepared his speech very carefully and more or less learned it by heart. Although this isn’t unusual in a maiden speaker, Churchill – more unusually – continued this meticulous preparation throughout his career.

In a sense, the whole of Churchill’s previous career had been a preparation for wartime leadership. An intense patriot; a romantic believer in his country’s greatness and its historic role in Europe, the empire, and the world; a devotee of action who thrived on challenge and crisis; a student, historian, and veteran of war; a statesman who was master of the arts of politics, despite or because of long political exile; a man of iron constitution, inexhaustible energy, and total concentration, he seemed to have been nursing all his faculties so that when the moment came he could lavish them on the salvation of Britain and the values he believed Britain stood for in the world.
'... 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 ...'
The emotions of the speaker and the listeners are alike aroused. This recommendation addresses a requirement as frequently unmet today as it was in Churchill’s 19th century day and even before that: to align the speaker’s goals with those of the audience. A speech or a presentation is not a broadcast or podcast. The essential scaffold of rhetoric is a two-way street. It’s not just about you, it’s all about them.
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.