Defense

Part of the System outputs guide

Defense Defense protects a system against a Navarch's conquest, bombardment and pillage. It stays in the system.

The system header: defense, owner, star type, and the system's credit, technology and ideology output
The highlighted shield is the system's defense.

Population and defense

Each whole point of population in a system you own adds 0 defense. In a Flash game, population adds no defense. Dominions and autonomous systems never get any.

For example, in a Legacy or Tactic game, 20 population adds 3 defense.

The defense breakdown of a system
The highlighted row is the defense that population adds.

What it does

  • More defense lowers a Navarch's chance to conquer, bombard or pillage the system.
  • More defense also means more damage to the attacking fleet.

The odds themselves are explained with the Navarch actions.

Buildings that produce defense

Building Built on Effect
Planetary Shield Planetary Shield Habitable Planets +24 Defense
C.N.D. C.N.D. Barren Planets +1 Defense per Defense
Interception Tunnels Interception Tunnels Barren Planets +2 Defense per Local Population
Assembly Superstructure Assembly Superstructure Moons and Asteroids +8 Defense
Constellation of Lures Constellation of Lures Moons and Asteroids +7 Defense
Space Dock Space Dock Moons and Asteroids +6 Defense

A C.N.D. adds a share of the defense the system already has, before percentage bonuses. See How bonuses add up.

Other sources of defense

Source Type Effect
Centralization of Power Lex -25 % Defense
War Council Lex +30 Defense
Syns strength (Synelectic Federation) Tradition +10 % Defense
Navarch — Defense Agent skill +5 Defense

Defense does nothing against a Siderian's Control. The system's stability defends against it. See dominions.

Defense does nothing against the Erased either. Intelligence defends against them.

Numbers shown for Flash games. Other speeds: Legacy Tactic