Service

Payment through physical presence to do the work that is required for something. Tenants owe a knight service—field labor—in return for his protection. In turn, a knight owes his lord service in return for holding a manor. A knight’s service is “aid and counsel”.  Aid is military aid in the defense of the lord’s lands (Including the knight’s own holdings) and 60 days active service at the knight’s own expense.  Counsel is advice, given whenever asked. Your knight may be summoned to his liege's court at any time. It’s possible to serve more than one liege but these duties frequently conflict, to the knight’s detriment.