They — That is, Joab and his army. A bank — From whence they might either batter the wall, or shoot at those who defended it. It stood — The bank stood in, or near to the trench, or the wall of the city; so that the city was in great danger of being taken.
Related Commentaries of 2 Samuel 20:15
2 Samuel 20:15
15 And they came and besieged him in Abel of Bethmaachah, and they cast up a bank against the city, and it stood in the trench:e and all the people that were with Joab battered the wall, to throw it down.