It happened in those days, that the Philistines gathered their hosts together for warfare, to fight with Israel. Achish said to David, Know you assuredly, that you shall go out with me in the host, you and your men.
Now Gilboa is up in the area just south of the Sea of Galilee. So the Philistines had really moved a long way against the Israelites. Gilboa is clear over-actually the one side of Gilboa goes down to the Jordan River. So the Philistines had really taken a lot of the territories at this point. Saul was being boxed in to just a very small area. There he was encamped in Gilboa.