(Geallieerden) The term Allies referred to the countries that opposed the Axis powers. The major allies were the United Kingdom, the United States, and the Soviet Union. The core of the Axis powers consisted of Germany, Italy, and Japan. The term Axis was first used by the Italian dictator Benito Mussolini in November 1936 when he spoke about a Rome-Berlin axis. Italy and Germany had signed a Pact of Friendship.