therefore said I, Now will the Philistines come down on me to Gilgal, and I haven't entreated the favor of Yahweh: I forced myself therefore, and offered the burnt offering.
So Jonathan was out wiping out the Philistines and Saul was around blowing the trumpet, and taking the glory and announcing that he had smitten the Philistines so that the Israelites heard that Saul had smitten the Philistines with a great slaughter.