The walls of fortified towns had a broad space at the top, protected toward the exterior by battlements, along which the bulk of the defenders were disposed, and from which they hurled their missiles and shot their arrows. The king seems to have been going his rounds, to inspect the state of the garrison and the defenses.
Related Commentaries of 2 Kings 6:26
2 Kings 6:26
26 And as the king of Israel was passing by upon the wall, there cried a woman unto him, saying, Help, my lord, O king.