You're absolutely right, simpler form, based more on the military aspects of it, including allegiance to one's lord.
http://books.google.ca/books?id=QMQsAAAAMAAJ&pg=PA118&lpg=PA118&dq=Chivalry+%2B+ANglo+saxons&source=web&ots=hWTpCHGI7_&sig=Kf_4U14rzqR_ho-00FBfIn0Y1i8&hl=en&sa=X&oi=book_result&resnum=2&ct=result#PPA119,M1
