Complete the indicated task to unlock the corresponding medal in your Service Record:
Campaign Medal: complete all levels in Campaign mode.
Bronze Stars: complete a mission.
Silver Stars: complete Campaign mode.
Oak Leaves: get any seven medals in Campaign mode.
Wings: get to designated drop zones.
Weapon Expert: use each available weapons during a mission.
Marksman Award: kill a specific number of people in the head during a mission.
World War II: get all of the medals in Campaign mode.