Smoke Grenade Deploy a smoke grenade once per mission. The smoke confers +20 defense to all units, not just allies, and lasts during the enemy turn.
Corporal
Sprinter Allows the support to move 3 additional tiles.
Covering Fire Allows reaction shot to trigger on enemy attacks, not just movement.
Sergeant
Field Medic Allows medikits to be used 3 times per battle instead of once.
Smoke and Mirrors Allows 1 additional use of Smoke Grenade each mission.
Lieutenant
Revive Allows Medikits to revive critically wounded Soldiers at 33% of maximum health instead of just stabilizing them.
Rifle Suppression Fires a barrage that pins down a target, granting reaction fire against it and imposing a 30 penalty to aim.
Captain
Dense Smoke Smoke Grenades have increased area of effect and further increase units' Defense by 20.
Combat Drugs Smoke Grenades now contain powerful stimulants that grant +20 Will and +10% Critical Chance for all units in the cloud. (Also grants +20 Aim Bonus)
Major
Deep Pockets Confers an additional item slot in inventory. In Enemy Within, tha ability is chanaged to grant +1 charge to limited use equipment like Grenades and Medkits'
Colonel
Savior Medikits restore 4 more health per use.
Sentinel Allows two reaction shots during Overwatch, instead of only one.