Talk:Achievements/@comment-4632427-20130730081203/@comment-4632427-20130805030623

My alt account got it from Tanks at the Front Door. One of the fights has 5 Mammoth Riders, 5 Fences, and the 2 Bombards. I placed four R4 Gunners with Heavy Fire, two in the front row and two in the second row, and just dropped a bunch of Troopers in the remaining spaces to act as decoys. Fire each Gunner once and you should kill all the Mammoth Riders and win the fight on round 4.

On my main account, I did it with one of the respawning Silver Wolf battles in Recoil Ridge. Some of their formations have 10 unarmored units and 2 rocks. Well-ranked checkerboard strike units can clear them in 4 shots if you don't have any unlucky misses - I used a R4 Heavy Recon and three R5 Dragons, and got it on my third try.