Postcards:
Successfully complete the indicated task to unlock the corresponding postcard
Matches and wins:
Pacific Campaign: Win twice on every map as any team.
Tour Of Duty I: Play 50 matches.
Tour Of Duty II: Play 130 matches.
The Best: Get the highest score in a match.
Truly Elite: Get 10,000 Kills.
Kit specific:
Melee Man: Get twenty melee kill.
Master Of Your Domain: Get 17 kills playing as each class.
Master Blaster: Kill 50 enemies with grenades, rifle grenades, or explosives.
Rifleman: Kill 50 enemies with a semi-automatic rifle.
Infantryman: Kill 50 enemies with a submachine gun.
Sniper!: Kill 50 enemies with a scoped rifle.
Vehicle specific:
Motorman: Get 25 kill with a car, tank, and plane.
Parachutist: Use the parachute four times.
Milkrun: Fly a plane for twenty minutes.
Bomb Run: Launch an air raid killing at least one enemy.
Wheelman: Get 50 kills using a car, tank, or boat.
Fighter Ace: Get 50 kills using fighter planes.
Teamplay and miscellaneous:
Defender: Defend 20 flags.
Attacker: Capture 30 flags.
Veteran: Capture 50 enemy flags.
Lifer: Reach the top rank.
Squad Assister: Get 100 squad assists.
Squad Avenger: Avenge 100 squad members.
Best Squad: Be in the best squad three times on each map.
Stamps:
Successfully complete the indicated task to unlock the corresponding stamp:
Kit specific:
Knife Efficiency: Kill four players with melee weapons.
Explosives Efficiency: Kill four enemies with grenades or explosives.
AT Efficiency: Kill four vehicles with recoilless rifle.
Rifle Grenade Efficiency: Kill four enemies with rifle grenades.
Pistol Efficiency: Kill four enemies with a pistol.
Rifle Efficiency: Kill four enemies with a semi-automatic rifle.
SMG Efficiency: Kill four enemies with a submachine gun.
Sniper Efficiency: Kill four enemies with a scoped rifle.
Vehicle specific:
Vehicle Efficiency: Destroy six vehicles in any fashion.
Jeep Efficiency: Get four kills with a car.
Tank Efficiency: Get four kills with a tank.
Plane Efficiency: Get five kills with a fighter plane.
Boat Efficiency: Get two kills with a landing craft.
HMG Efficiency: Get four kills with a heavy machine gun.
Air Defense Efficiency: Kill two planes with an anti aircraft gun.
Bombing Efficiency: Kill four enemies with air raids.
Teamplay:
Air Superiority: Shoot down three bombers.
Vehicle Assist Efficiency: Get five vehicle assist kills.
Leatherneck: Kill at least twenty enemies.
Defender Efficiency: Defend five flags.
Attacker Efficiency: Capture five enemy flags.
Best Squad: Be the best squad of the round.
Teamplayer: Get ten squad assists.
Squad Excellence: Each squad member gets any one stamp and kills ten enemies.
Repairing planes:
Land your plane on the landing pads or ships to repair them at anytime.