Winston Churchill, one of the greatest orators of the 20th century, was interestingly enough, like Demosthenes and other great orators before him, born with a speech impediment which he worked on until it no longer hindered him. One would never guess this from hearing Churchill's strong and reassuring voice, a voice that would buoy up Britain during some of her darkest hours.

During the Battle of France, Allied Forces became cut off from troops south of the German penetration and perilously trapped at the Dunkirk bridgehead. On May 26, a wholesale evacuation of these troops, dubbed "Operation Dynamo," began. The evacuation was an amazing effort-the RAF kept the Luftwaffe at bay while thousands of ships, from military destroyers to small fishing boats, were used to ferry 338,000 French and British troops to safety, far more than anyone had thought possible. On June 4, Churchill spoke before the House of Commons, giving a report which celebrated the "miraculous deliverance" at Dunkirk, while also seeking to temper a too rosy of view of what was on the whole a "colossal military disaster."

Source: https://www.artofmanliness.com/we-shall-fight-on-the-beaches-by-winston-churchill/