The Walls of Jericho came Tumbling Down...

 ...welp. Turns out they actually did.

The cause was not, however, magical invocation of God via trumpets.

So, what happened? About 3,600 years ago, an asteroid similar in size to the one which struck Tunguska hit the city of Tall el-Hammam, 14 miles away from Jericho. That city was destroyed (the real Sodom, perhaps?).

The shockwave blew down Jericho's walls.

So, yeah. Jericho's walls really did get blown down. And in the typical manner of oral history written down many years later...

...while it's unlikely it happened during a siege because it would probably have killed most of the besieging army, did the Hebrews take advantage of this to take a city they'd been planning on capturing? And what else could it have appeared to them as but an act of God?