Soldier campaign, Operation #2 (Onwards to Glory), Mission #4 (A Night Out On The Town).
In this level, there's an area in the upper-left that is crawling with enemy troops, around 8 or so all nestled together. You can spend 5K on Intel to see them early on upon your
button's map.
Purchase an Air Strike use for 7.5K by using the
button's shop menu, make your way to the right from the start. Kill the sniper that is on the hill to your north, then circle around said hill towards the northwest. If you're quick enough, they shouldn't have moved far from their original position to chase after you. Just aim the airstrike (hold
and move the right stick) a short ways in front of where they are headed, and you should nail at least three. If not, finish the stage to earn back command points, then try again while adjusting your aim.