Exactly one of these statements about mounted knights on the later medieval battlefield is false. Which statement is it?

Explanation

Missile weapons used in quantity, and later firearms, made the shock charge a far less reliable way of deciding a battle, and armies came to depend more on foot soldiers who could deliver that fire. The false statement dates the end of knightly service far too early, because men of knightly rank went on serving as heavy cavalry for generations after guns had become ordinary equipment, in altered roles.