Commentaries:
Barnes' Notes
Cast up a bank - See the marginal references. The throwing up of mounds against the walls of besieged places by the besiegers is well illustrated in the Assyrian sculptures.
The trench - The "pomoerium," or fortified space outside the wall. When the mound was planted in the pomoerium the battering engines were able to approach close to the wall to make a breach.
Other Barnes' Notes entries containing 2 Samuel 20:15:
2 Samuel 20:14
Psalms 48:13
Habakkuk 1:10
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