محمود الثاني
Garshasp urged Ahmad to invade the domains of Mahmud II in Central Persia, and gave him information on how to march to Central Persia, and the ways to combat Mahmud II. Ahmad accepted and advanced with an army to the west in 1119, where he together with "five kings" defeated Mahmud II at Saveh. The kings who aided Ahmad during the battle was Garshasp himself, the Emir of Sistan and the Khwarazm-Shah, including two other unnamed kings. After being victorious, Ahmad then restored the domains of Garshasp II.