Would be a diplomatic thing. You send the request to a legion and if they accept you are at war.

During the time War Mode is Active if you hit the action limit and you come across a member of the enemy legion the limit would not apply to the enemy(hope this makes sense). Basically the the action limit would not apply to enemies.

You would also get badges for disabling, hacking, or raiding members of the enemy legion and after your legion collects enough badges they can scan the enemy legion's base. So basically the legion would have to work together to collect a ton of badges so they can take on their enemies base.

There would also be a point system. It would be something like:
Disabling The Enemy Base: 10 Points.
Planet Theft= 5 Points.
1 Disable= 3 Points.
1 Raid= 2 Points.
1 Hack= 1 Point.

During the War Mode there will be a 20% chance of members of the enemy legion appearing on your battle tab.

More legions can join the war: A legion wanting to join the war would go to legion it wants to ally with and request to join.

Enemy Players can be alerted every 2 hours while war mode is active and enemy planets every 6 hours.

The winner of the war will be the legion and its allies that manages to get the most points during the war.

Extra War mode badges would disappear so they cant be used in future wars to quickly lock enemy bases (feel free to come up with an alternative solution).

The winners of the war would get a reward of some sort possibly something they can spend extra War Mode badges on.

EDIT: Thanks to Epic, Darth, Hawk, for helping me collect links to old ideas.

+1.

Only comment I have is that your points system is unfair in my opinion. 4 disables is more points than disabling the base? I don't think so. My points spread would be more like:

Base Disable=100 Points
Planet Theft= 20 Points.
1 Disable= 5 Points.
1 Raid= 1 Points.
1 Hack= 1 Point.

Reasoning for the big points: Base battles can be very tough for low- and mid-rank legions, and it's not THAT easy to come across your enemy's planets.

Simple and effective

A possibility for the rewards could be legion bonuses, 10% bonus base production, double AP for a week, and possibly include a leaderboard for the most effective war legions

Suggested so many times....

A real war is fought until one side can no longer fight or surrender. Points are not used in real warfare...

no, but they are used in any war style game.

The idea has been passed around a few times, yours looks fairly filled out.
+1

viewtopic.php?p=86895#p86895

how bout you mix your idea with mine i would like that kinda war mode:

viewtopic.php?f=6&t=21016&hilit=+war+mode

I missed that one, I wasn't here

Almost all good, and badly needed. I strongly suggest there be no reward, perhaps other than what the legions involved pony up as a wager. As soon as you add an incentive, like "war badges", this will be exploited. I.e. friendly legions will take turns being defeated. To be honest, no incentive is needed: the community has been clamouring for this for a long time. The bragging rights alone would be enough: a separate tab for 'Defeated Legions' would be very cool.

I like Vyger's idea of a wager instead of badges. Moves money around instead of just pouring more into the game.

whatever legion you request to go to war with would have to accept the request first and for the most part the War Badges are for scanning the enemy legion's base and earning points on it.

In my version of a war mode I believe I added in where for every war won you have a little medal say and when clicked it sends you to a screen where you can see the stats for the war. Other than a little addition similar to the one above I think this is a short but sweet idea.