From Silver Sun Republic Codex

Campaigns are established offensive military actions that consist of a beginning state and an end state. Goals of campaigns can include physical destruction or raiding of enemy territory, seizure of land or the unconditional surrender of an adversary. Each Campaign should describe the 5 W's, Who, What, Where, When, Why and consist of a How which forms the Concept of Operations (CONOPS) as a proposal and becomes an Operational Plan (OPLAN) when it is adopted and accepted as a campaign. The compartmentalized information that is distributed to specific units are materialized in an Operational Order (OPORDER) which can include the specific requirements of personnel and materials to carry about the campaign. Not all details will be given to all units in every situation in the interest of Operational Security (OPSEC)

The planning and execution of a campaign is handled by the various functions of the War Staff.