Where can I find Defense strengthening in Staufenberg?

Defense strengthening can also be found in these cities:

Amöneburg Buseck Dautphetal Giessen Hüttenberg Kirchhain Langgöns Lich Linden Lollar Marburg Mücke Pohlheim Rabenau Weimar (Lahn) Wettenberg Wetzlar

You can also find this in Staufenberg:

Fish Sticks Roll Cheesecake Help Sunflower Seed Bread Power Bar Salads Iced Tea Coffee Infant Food Dips And Sauces