If IMC is planning to implement an Alliance War in ToS. Can you give each player a uniform costume for their corresponding faction alliance. And make it a mechanic that the player has to wear the costume to participate in the event. Or default the character costume to the faction costume if they choose to participate in the event.
Alliance War in IMC old game is when guilds would join in lore based alliances, these alliances fight each other in MOBA/battleground like mechanics and killing the opposite alliance leader NPC boss.