Main mission objectives:
1) Reach the square
2) Cover emergency extraction
3) Reach extraction point
Possible drop zones:
A) Smaller road, located to the east of the city
B) Main road leading to the town's square
I think that the choice is going to be very obvious this time. If you decide to choose the first option, you will have a much easier start. This is very important, because despite what you might think, you won't be rushed by anything or anyone. Additionally, this is going to be your first night mission, so you will have plenty of opportunities to stay in the shadows and attack enemy units by surprise. If you've decided to choose the second drop zone, you would be more exposed to enemy fire and you wouldn't be able to surprise enemy units by flanking them. As a result, it would be a lot more difficult to deal with some of the first large group of rebel units.
The first part of this mission is going to be very simple, however later during the game you will have to participate in some very difficult challenges. MAKE SURE that you have a sniper in your team, because you're going to need him in the future. I wouldn't recommend saying goodbye to any of your rifleman units, especially since they have been equipped with decent guns (as well as your main character).
Red arrows represent suggested routes to all of your main goal areas. Check the main description for this mission if you want to find out more. This picture was added only for a better orientation. A and B icons are two possible drop zones for this mission. You will have to choose between them before proceeding any further. The exclamation mark icons represent mission goal areas. You will have to go there in order to fulfill main mission objectives.