What is the formal charge that an overlord would level at a vassal for not fulfilling his feudal obligations (Example – Late Walder Frey during Robert’s Rebellion)? Thank You – RSAFan

The name of the formal charge is actually….”felony.”

Indeed, if we consult legal dictionaries, we find that “felonia” was originally understood to mean “the act (or offense) by which a vassal forfeited his fee.”