He spent a great deal of money in building the "New Castle" in Stuttgart and elsewhere, and sided against Prussia during the Seven Years' War of 1756–1763, which was unpopular with his Protestant subjects.
Ta kulutas palju raha "uue lossi" ehitamisele Stuttgardis, ja asus Seitsmeaastase sõja ajal (1756–1763) Preisimaa vastu, mis sai tema protestantlike alamate seas ebapopulaarseks.