Dear Commander, Officers are the powerful support when you fight the Evil Legion and the core system to improve your strength.
Officers are required to join the operations like Special Operation and Battlefield Expedition.
 
Special Operation:
-Attribute of Special Operation Squad is determined by the officer.
-Officer’s Special Operation Skill is active. It will help you get the victory.
 
Battlefield Expedition:
-Officer and Parade Ground determine the number of marching troops.
-Unlocked Skills of exploring officers provide bonus for marching troops.
 
In HQ, you can use Command and Assign to improve your strength with officers.
 
Officer Command:
-Appoint officers to the posts to activate Command and improve attributes.
-Appoint specific combination of officers to activate extra attribute.
Refer to How could I obtain officer's command buffs? for more details.
 
Assign Officer:
-Assign the officers to the specific Department to activate officer’s Strategic Skills and improve attributes.
Refer to How do Officer’s Strategic Skills take effect? for more details.