While you’re talking with Longinus, who happens to tell you about receiving free guns from liberating Bell Towers, you get word that Banapur is under attack from Min’s Royal Army. You now have six minutes to make it back to Banapur, or else you will fail and have to restart the mission. Fortunate for you, this is more than enough time to get there.
Once you manage to make it back to Banapur, the timer will disappear and you should see enemies throughout the village. It’s best to avoid using stealth at this point, since there’s a lot of buildings and stuff in the way. As soon as you open fire on an enemy, it’s highly likely that the others will start coming towards you.
At this point, the mission isn’t timed anymore, so it’s important to take your time and try to pick off each enemy one by one. Things start to go downhill if you rush too much, although there’s a need for that at times. Anyways, keep killing the enemies in the village until you see the updated objective to kill the reinforcements, which means there will be some helicopters on the way.
Thankfully, you don’t have to go after the choppers, as they will simply drop off more enemies, but if you have the firepower, there’s no problem with bringing down those birds. Continue slaying enemies until Amita chimes in and says Bhadra is in trouble, which is your cue to head to the marker on your map.
When you get there, you find that the front is blocked and you’ll need to find another way in. Go around to the side and climb the ledge, then hop through the window. Bhadra is downstairs, so just drop down to the left whenever you get through the window and approach her on the ground. The rest of the mission will play out on its own, then it will be over.