Ammon - The Ammonites under Nahash attacked Jabesh-gilead and refused to accept the offer of the latter to save them, unless the Jabesh-gileadites would put out all their right eyes (1Sa 11:1, etc.). Saul rescued Jabesh-gilead. The Ammonites joined the Chaldeans in their invasion of Judea for the sake of plunder.
ripped up ... women with-child - as Hazael of Syria also did (2Ki 8:12; compare Hos 13:16). Ammon’s object in this cruel act was to leave Israel without “heir,” so as to seize on Israel’s inheritance (Jer 49:1).