Army boys dominated the game right from the kick-off and found the target in the 30th minute with striker Royal Lepcha's powerful 25-yard right-footer.
Lepcha struck again at the 38th minutes when his header went into the opponents' net after getting a floating cross pass from Jullen to increase the margin to 2-0.
TFA team appeared off colour today and their strikers failed to penetrate into the rival defence.
In second match of the day, SBT (Kerala) beat BRC (Danapur) by a lone goal.
After a barren first half, the all-important goal came through striker Sumesh in the 60th minute when young striker Atif Sahir sent a cheeky through ball to Sumesh inside the box who calmly pushed the ball inside net from close range.