ban.

About ban

In the Middle Ages, the ban or banality was originally the power to command men in war and evolved into the general authority to order and to punish. As such, it was the basis for the raising of armies and the exercise of justice. The word is of Germanic origin and first appears in fifth-century law codes. Under the Franks it was a royal prerogative, but could be delegated and, from the tenth century, was frequently usurped by lesser nobles.