In the inaugural match today, Karnataka sounded the boards in the 49th minute through Machiahpa but four minutes later former India internationals Deepak Thakur equalised for IOC.
In the second match, Army dominated the proceedings and opened their account in the 19th minute when Jonny Jasrotia scored from the team's third penalty corner.
Others to score for the Army were Biraj Ekka (21st), Binoy Bengra (52nd), Siraju (55th), Chandan Aind (64th) and Pawal Lakra (70th).