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Pitched in the land of Gilead.--Gilead is the tract of country on the east of the Jordan, extending from the land of Moab on the south to Bashan on the north, the valley of the Hieromax forming probably its northern boundary. The site of Mahanaim has not been identified, but it was almost certainly within the territory of Gilead. Absalom, however, did not actually reach Mahanaim before he met and was defeated by the forces of David.
17:22-29 Ahithophel hanged himself for vexation that his counsel was not followed. That will break a proud man's heart which will not break a humble man's sleep. He thought himself in danger, concluding, that, because his counsel was not followed, Absalom's cause would fail; and to prevent a possible public execution, he does justice upon himself. Thus the breath is stopped, and the head laid low, from which nothing could be expected but mischief. Absalom chased his father. But observe how God sometimes makes up to his people that comfort from strangers, which they are disappointed of in their own families. Our King needs not our help; but he assures us, that what we do for the least of his brethren, who are sick, poor, and destitute, shall be accepted and recompensed as if done to himself
So Israel and Absalom pitched in the land of Gilead. Which belonged to the tribes of Reuben and Gad, and the half tribe of Manasseh; here the Israelites that were with Absalom encamped, in order to give battle to David and his men.