Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Back-blast Clear	10 kills while possessing a rocket unit.
Captain	Survive for 15 minutes in single round on hard difficulty.
Colonel	Survive for 30 minutes in single round on hard difficulty.
Dead Eye	10 kills while possessing a sniper.
First Lieutenant	Survive for 10 minutes in single round on hard difficulty.
Florence Nightingale	Assist 20 enemy casualties.
Good Effect	10 kills with one artillery barrage.
Gun Run	Supress or kill 7 units with the strafing run.
Last Resort	2 kills while possessing a medic or engineer.
Lieutenant Colonel	Survive for 25 minutes in single round on hard difficulty.
Major	Survive for 20 minutes in single round on hard difficulty.
Pen Pal	Kill an enemy unit at over 800m.
Second Lieutenant	Survive for 5 minutes in single round on hard difficulty.
Splash Damage	Kill 5 units with a single rocket.
Suppressing Fire	10 kills while using a machine gun emplacement.
This is my Rifle	10 kills while possessing a rifleman.