During World War II, Winston Churchill served as the prime minister of Great Britain who was the motivational speaker to encourage the soldiers through stirring speeches to be more excited to fighting the Nazis.
Franklin Delano Roosevelt
Franklin D. Roosevelt, who was the 32nd President of the United States and was elected for more than two terms, lead his country through hardships like the Great Depression, the surprising bombing at Pearl Harbor, and all four months of World War II. He declared his nation to be the "great arsenal of democracy".