'Commanding' in the Bible

The Lord revealed the following message during the year in which King Sargon of Assyria sent his commanding general to Ashdod, and he fought against it and captured it.

And the king of Assyria sent the Rabshakeh [his military commander] from Lachish [the Judean fortress commanding the road from Egypt] to King Hezekiah at Jerusalem with a large army. And he stood by the canal of the Upper Pool on the highway to the Fuller’s Field.