How did Philip II Augustus take advantage of Richard I’s captivity after the Third Crusade?

After departing the Third Crusade early, Philip II Augustus immediately prepared to attack the Plantagenet possessions in France, violating promises he had made while in the Holy Land. When he learned that Richard I had been captured by Leopold V of Austria while returning from the Crusade, Philip actively sought to prolong his rival’s captivity to prevent his interference.12

During Richard’s imprisonment, Philip continued his efforts to seize control of the Angevin territories. Although Richard was eventually released in 1194 and successfully defended his lands in subsequent military campaigns, Philip’s opportunistic actions during this period of instability were part of his long-term strategy to expand the French royal domain at the expense of the English crown.13