Defending

Summary

A Defense when a player's home base or resource base is attacked by another player's forces.
To successfully defend your base, the player's Headquarters or the Resource Base's Outpost must survive the attack.
- This can be accomplished in two ways: Destroying enough Troops to prevent them from finishing the attack before the timer expires, if at all, or force them to retreat.

Defenses can generally only happen when the player is offline.
- However, it is possible to be attacked when online after playing for a total of 4 hours in one day, after which any attack will boot the defending player off. A red countdown timer appears with less than 30 minutes on the 4 hour limit. After that, it is superseded by another timer, which will be active for the rest of the day and is reset once that day's event concludes.
Technically speaking, each player's base may be destroyed only once, but there's no limit on the number of attacks that can be made as long as one player's base or resource base is on another player's map.

It is not possible to enter the game while a base is under attack. Instead, the player has to wait it out.
If the base survives the assault, nothing is lost.
If the attacker is successful in destroying the home base, the defender loses a Victory Point and whatever Resources that were not protected by the Vault.
If the attacker is successful in destroying a Resource Base, it is taken by force from the defender, and any uncollected Resources that were on that Resource Base will be lost to the attacker.
When logging in after a defense, buildings that were damaged will be shown recovering health. This, however, is cosmetic, as all bases are fully reconditioned between attacks, with all building back to mint condition and all Mines restored at no additional cost.

Diamonds and Intel earned on a home base defense (regardless of whether the defense wins or not) are related to how many housing space worth of troops are destroyed. Any rewards earned from an attack on your base can be claimed from the attack's entry in your Activity Log.
- Anything that do not count toward casualties will not give diamonds when destroyed. This includes Critters, troops resurrected by Second Wind/Remote Defib, as well as units spawned by temporary gunboat abilities.
The same attacker could only provide up to 4 Intel, although Diamonds can still be earned.
Resource Bases do not yield any rewards in defense whatsoever.
There's an achievement which is called Strategist that gives a total of 60 diamonds upon successfully defending the home base against a total of 800 attacks.

Units (housing space) Destroyed	Diamond Reward	Chance of First Intel	Chance of Second Intel
0-9	0	0%	0%
10-24	1	100%	0%
25-44	2	100%	5%
45-69	3	100%	10%
70-99	4	100%	25%
100-134	5	100%	50%
135-174	6	100%	70%
175-224	7	100%	100%