When Elizabeth ascended the throne, the Soviet Union was in the iron grip of Joseph Stalin, China was led by Mao Zedong and the president of the United States was Harry Truman.
The Queen held an audience with 15 British prime ministers, most recently Liz Truss, but her record reign also spanned 14 American presidents, from Truman to Joe Biden. She met them all, Democrat and Republican, except Lyndon Johnson.
