This next objective is only a short introduction to the final task of this mission. Your goal here will be to return to the town square area, because that's where you'll take part in a second assault. I'm sure that you won't have any major problems finding this spot. The problem is that the road leading to the town square is going to be guarded by a small group of enemy units. As a result, you will have to kill them in order to be able to proceed forward.
Reaching your target:
As I've already mentioned, you will have take out one large group on your way to the main destination. The enemies will appear near the northern gate. That's where you've started your run towards the sniper building. You've got two choices here. You can either choose the sniper rifle from the inventory and take them out from a very large distance or you could use the buildings to your left. This would allow you to get closer to them. Either way, they have to die. The final objective will appear on your list once you're close enough to the town hall.