One player can invite other players who are in his Union to organize a United Offensive.

Before dispatching troops, the player sets the number of players of a United Offensive in the Dispatch interface of the General Headquarters. After selecting the number of troops to be dispatched, the player can view troop information in Troop Status under Intelligence. Click the Invite button to ask other players to take part in the United Offensive. The invited player will view the invitation in Invader Alert page.

The invitees must arrive at the destination earlier than the inviter, who can set Rest time to extend marching time.

The inviter controls the battlefield in the United Offensive.

In a successive United Offensive, resources are allocated proportionally according to the idle load of each party.

In a successive United Offensive, only the inviter gains officer experience and reputation.