Asking for unrelated help?

Some mission seem to be closed to a smaller selection of factions. Is it possible to ask for another unrelated faction to assist if you inform them of the event while in-character, or is it still closed to them?

A great question,

Faction Only missions are designed to give faction specific challenges. If there is a good characterful reason why a player would like to in-character invite a non-faction member to join the battle it can be accomplished, but will not be the norm.

Put together a paragraph reason (in character) why that ally should be at the battle, and then PM it to admin and please give 48hrs for us to look it over, think about it, and decide if it makes sense to allow that non-faction member into the faction mission.

Since faction missions are usually designed to test equal sized forces (relatively) some may be inappropriate to open to certain non-involved factions.

Understood, thanks for the clarification.