Shoot at the enemy machine

gun position at the stairway or behind the cover next to it and kill as many as you can
After a while there will be teammates to blow up the bunker, the first is relatively easy to solve, the second distance is farther, and not only a direction of the enemy, and the sky is dark, need to be careful. The second machine gun position is also blown up after killing a target apartment building where the threat is greater enemies, and then while looking for cover while rushing up, kill downstairs, and wait for teammates to throw a grenade to the house to blow up the enemy after going in. The house is recommended to use shotgun, it does not matter, but I think this is more atmosphere. After killing all the enemies, go outside and rendezvous with friendly troops and get into a Humvee to go to the next battle site.