Bible Verses About Sieges: Frequently taken by ambush

and he taketh the people, and divideth them into three detachments, and layeth wait in a field, and looketh, and lo, the people are coming out from the city, and he riseth against them, and smiteth them.

And Abimelech and the detachments who are with him have pushed on, and stand at the opening of the gate of the city, and the two detachments have pushed against all who are in the field, and smite them,