Who was a a leader in the 1930s?

Which countries?

In the U.S.- Franklin Delano Roosevelt

U.K.- Neville Chamberlain and Winston Churchill

France- Charles de Gaulle

Germany- Adolph Hitler

Italy- Benito Mussolini

If you go to your local public library and ask your question, you may be directed to a set of encyclopedias. In this way you can look up each country to find the appropriate leaders.