Avar and sassanids I studied this in history class
In mid-July, President Harry S Truman was notified of the successful test of the atomic bomb, what he called “the most terrible bomb in the history of the world.” Thousands of hours of research and development as well as billions of dollars had contributed to its production.
World leaders can go by many titles: premier, chancellor, dear respected comrade. But two of the most common are president and prime minister. What differentiates them other than the latter’s hint of continental flavor?
The answer would be: carry out laws. Hope this helps you.