Tiny Troopers

This achievement requires that you destroy a cumulative total of 10 tanks across all plays and replays of all missions. Tanks have a large health bar, but can be destroyed with a single rocket, single air strike, or two to three grenades. The campaign will expose you to far more than 10 tanks. As long as you destroy each one you come across (and don't just run past them), you should have this before completing the campaign.