It is an event where Jump to border will be opened between two servers, and this event is like any normal attack in your base but against players from other servers where you can send troops to any base or location of resources in the crossing server, winning or losing depends on the player and not on the server.

Event Details: • Leaders from level 10 or above can participate in the event by clicking on the “Cross-server boarder" icon from the event list.
• Choose two servers and open the jump to the border between them.
• The war period is 48 hours after you open the jump to the border.
• Commanders from each server can only send their troops or scout units to other bases and resource locations.
• Units cannot be sent to occupy nuclear bases or to camp or to eliminate rebel forces.