Answer:
1- United Kingdom --- Winston Churchill
2- Soviet Union --- Mikhail Gorbachev
3- United States --- Harry Truman
4- Cuba --- Fidel Castro
Step-by-step explanation:
1- Winston Churchill was a British politician, statesman, historian and writer, known for his leadership of the United Kingdom during World War II. He is considered one of the great leaders of wartime and was prime minister of the United Kingdom in two periods (1940-45 and 1951-55).
2- Mikhail Gorbachev is a Russian lawyer and politician who was General Secretary of the Communist Party of the Soviet Union from 1985 to 1991 and head of State of the Soviet Union from 1988 to 1991.
3- Harry Truman was the thirty-third president of the United States from 1945 to 1953. Previously, he was the thirty-fourth vice president during the short fourth term of Franklin Delano Roosevelt between January and April 1945 and became president on April 12 of that year, due to the death of Roosevelt.
4- Fidel Castro was a Cuban lawyer, soldier, politician and revolutionary. He was president of his country as prime minister (1959-1976) and president (1976-2008) after his victory in the Cuban Revolution against the dictatorship of Fulgencio Batista.