How did Philip II Augustus become king of France?

Philip II, known as Philip Augustus, became king of France through his status as the son of Louis VII and Adela of Champagne. Because his father had fallen mortally ill, Philip was crowned at Reims on November 1, 1179, to ensure his association as king.21

Initially, his uncles from the house of Champagne attempted to control the young monarch, but Philip successfully asserted his independence by marrying Isabella of Hainaut in 1180 and negotiating with Henry II of England to isolate the Champagne faction politically. Upon the death of his father on September 18, 1180, Philip II became the sole king of France in both name and fact.2