Joel 2:7 - Matthew Poole's English Annotations on the Holy Bible

They, locusts, and they who by the locusts are signified, viz. Chaldeans, Assyrians, or Babylonians, shall run, with speed, fierceness, and irresistible power, against their enemies. Mighty men; valiant and strong men, or giants. They shall climb the wall; no walls of any fortified towns shall be high enough to keep them out. Strange locusts, that assault cities! but armed and commissioned of God, they shall vigorously act their part, and do what he appointeth and commandeth them to do. Like men of war; who fear no power that from within the cities might oppose them, they shall valiantly and skilfully manage the assault. They shall march every one on his ways, and they shall not break their ranks: naturalists testify the truth of this in the stories of these insects, and their marshalling of themselves, of which also see Proverbs 30:27 Nahum 3:17. This skill in ordering, and steadiness in keeping order, like exactly trained soldiers, foretells the terror and strength both of the armies signified by these locusts, and of the locusts themselves. As these then did, so the Assyrians, Chaldeans, or Babylonians should proceed in arms against this people.