Successfully complete the indicated task to unlock the corresponding achievement.

Achievement	How to unlock
Captain	Captain rank.
Colonel	Colonel rank.
Corporal	Corporal.
First Lieutenant	First Lieutenant.
General	General rank.
Lieutenant Colonel	Lieutenant Colonel.
Major	Major rank.
Major General	Major General.
Private First Class	Private First Class.
Second Lieutenant	Second Lieutenant.
Sergeant	Sergeant.
Sergeant Major	Sergeant Major.
Staff Sergeant	Staff Sergeant.
Warrant Officer	Warrant Officer.