So, what may have happened is that Saxony and Poland declared war on me, and Saxony is a protectorate of Poland. After Prussia and me (Austria) crushed Poland I made them a protectorate. Saxony now appears to be my protectorate as well. However, their troops are still occupying my farms! They don't have military access and I can't attack them without declaring war! I'm using IS 1.066 with the protectorates version of the startpos.esf