Final answer:
No specific individual named Philip is indicated to have left someone in charge of French forces; however, Marshal Philippe Pétain became a prominent leader during the Vichy period in WWII after France's division, and Louis XVIII took power after Napoleon's abdication.
Step-by-step explanation:
In the historical contexts provided, no single French commander is specified as being left in charge of the remaining French forces following the actions of Philip IV, Napoleon's defeat, or during the French administration in Vichy.
However, Marshal Philippe Pétain is highlighted as a major figure who took a prominent leadership role during the division of France in World War II, overseeing the Vichy government after France's defeat by Germany in 1940.
In the earlier Napoleonic era, after Napoleon's abdication, it was his intention for his son to claim the throne, but this was not realized and instead Louis XVIII was recognized as the king of France.