Israel and Syria were at this time in a state of almost constant war. If there was not open conflict, there were border raids. At the time that Ahab met his death, the armies of Israel had gone against Syria to retake Ramoth in Gilead across the Jordan (1 Kings 22:3, 4). After the death of Ahab it was Syria that had the upper hand over Israel, and now its armies were once more on Israelite soil.
Benhadad II was still king in Syria (2 Kings 6:24).
Such and such a place.
The particular place is of no importance. At one time it would be in one place, and then again in another.
Shall be my camp.
What is meant here is more than an open permanent camp, for the whole countryside soon would know where that was located and could so inform the king without the prophet. What is probably referred to by this obscure Hebrew word, unattested elsewhere, is an ambush set for a sudden raid, where the element of surprise or secrecy was involved.