I checked out the Wiki as well as a forum search but I wasn't able to find anything. One of the new items for Guardians has a special effect of "-2 on Army Action Cooldown" and I was just curious as to what this does. I already lost out on the Legendary Deed to get this.

I am not exactly sure on this, however I think I do have a guess. The ability that you are referencing is on an accessory only equip-able by guardians. I know the dust guardian has an ability where it can heal a whole army so maybe that is counted as an `army action'. It is possible that the other guardians have army actions as well. I have not had much time with the dlc yet, so once I get those guardian units rollin' Ill be sure to come back and comment further.

Each guardian can perform one guardian-specific army action: Skoros can heal an adjacent army, Neros can destroy resource extractors and watchtowers etc. The thingie that grants "-2 on Army Action Cooldown" allows guardians to use army actions more frequently.

Vicarious wrote:
Each guardian can perform one guardian-specific army action: Skoros can heal an adjacent army, Neros can destroy resource extractors and watchtowers etc. The thingie that grants "-2 on Army Action Cooldown" allows guardians to use army actions more frequently.

Then why do they call it 'Army Action'. Army action would be something done by an Army. Should be '-2 on Guardian Action Cooldown'.

This is what led to my main confusion. Thanks Vicarious for the answer.