'Ambushment' in the Bible

And Joshua sent them forth; and they went to the ambushment, and abode between Beth-el and Ai, on the west side of Ai: but Joshua lodged that night among the people.

And Gaal the son of Ebed went out, and stood in the entrance of the gate of the city: and Abimelech rose up, and the people that were with him, from the ambushment.

But Jeroboam caused an ambushment to come about behind them: so they were before Judah, and the ambushment was behind them.