Charles Ellicott Commentary 2 Chronicles 33:14

"Now after this he built an outer wall to the city of David, on the west side of Gihon, in the valley, even to the entrance at the fish gate; and he compassed Ophel about [with it], and raised it up to a very great height: and he put valiant captains in all the fortified cities of Judah." — 2 Chronicles 33:14 (ASV)

Now after this ... valley. —Rather, And afterwards he built an outer wall to the city of David westward to Gihon in the ravine. Manasseh completed the wall begun by Hezekiah (2 Chronicles 32:5). This highly circumstantial account of the public works undertaken by Manasseh after his restoration is utterly unlike fiction and almost compels the assumption of a real historical source, no longer extant, from which the whole section has been derived.

Even to the entering in of the fish gate. —The fish gate lay near the northeast corner of the lower city (Nehemiah 3:3). The direction of the outer wall is described first westward, and then eastward.

And compassed about Ophel. —And surrounded the Ophel (mound); namely, with the wall, which he carried on from the northeast to the southeast. Uzziah and Jotham had already worked upon these fortifications (2 Chronicles 26:9; 2 Chronicles 27:3). Manasseh now finished them, raising them up to a very great height.

Raised it —i.e., the outer wall.

And put captains of war. —(Compare 2 Chronicles 17:2; 2 Chronicles 32:6.) Literally, captains of an army (sârê chayil).

Of Judah. —Hebrew, in Judah. Some manuscripts and the Vulgate read as the Authorised Version.