So the people shouted when the priests blew with the trumpets: and it came to pass, when the people heard the sound of the trumpet, and the people shouted with a great shout, that the wall fell down flat, so that the people went up into the city, every man straight before him, and they took the city.
All Commentaries on Joshua 6:20 Go To Joshua 6
Augustine of Hippo
AD 430
Besides the signs just mentioned and the voices which could be heard in the neighborhood of the ark, other miraculous testimonies to the law were witnessed. For example, when the people were entering the promised land and the ark was crossing the Jordan, the river stood still above them and flowed on below them so that the ark and the people had a dry place for crossing. Again, when they came upon the first hostile city where the religion was pagan and polytheistic, the ark was carried around it seven times and then, suddenly, the walls collapsed before a hand was raised or a battering ram was used.