Frederick II (1712-1786), or Frederick the Great, was king of Prussia from 1740 to 1786. He combined the qualities of a warrior king with those of an enlightened despot.

The eldest son of Frederick William I of Prussia and of Princess Sophie Dorothea of Hanover, Frederick II was born in Berlin on Jan. 24, 1712. His father was a hardworking, unimaginative soldier-king, with no outward pretensions and no time to waste on superfluous niceties. Even as an adolescent Frederick, with the tacit support of his mother, rebelled against this mold. He preferred French literature to German and the company of young fops to that of old soldiers.

In 1730 Frederick and a young friend, Lieutenant Katte, planned a romantic escape to England, but their plot was discovered. The would-be escapees were arrested and condemned to death for desertion, and Katte was executed in Frederick's presence. The crown prince was spared upon the entreaties...