This achievement is obtained on Operation F Mission 2.
You have to destroy all of the mega turrets with the Grizzly Tank. The mega turrets are the huge buildings that are shooting what looks like double wraith shots at you. There are four of them throughout the map. If your tank is severely damaged you can commandeer a fellow Spartans tank and still obtain the achievement.
I apologize for the mic cutting in and out.
This video is from the Xbox One version but the achievement is completed in the same way.