What name is given to the code of behavior expected of a medieval knight?

Complete the nursery rhyme: "Cock a doodle doo! My dame has lost her ___". What does "C.O.D." stand for when stamped on a package? What was the code name of the FBI sting that implicated public officials and became public in February 1980? The July 1944 plot code-named Operation Valkyrie was an attempt to kill which leader? "Coffey's Hands" was the third installment of which Stephen King novel, published in serial form in 1996? Coffinite, a mineral first described from the Colorado Plateau in the 1950s, is an important ore of which radioactive m… What term describes the study or collecting of coins? Jerome Robbins's ballet "Fanfare" debuted in New York in 1953 on the same day which monarch was crowned?