This article contains speculation, information which has not been confirmed by a reliable source. The game is still in development, and all information is subject to change.
An Army is Firefall's most basic player-organization structure. Similar to Clans or Guilds in other online games and communities.
At PAX East 2011, 4 custom armies were shown (Blood Falcons, Emerald Blades, Stellar Ponies, and The Brood), and it was announced that each of those armies had custom insignias and war paint created with in-game tools. The depth of customization allowed for the players has yet to be seen.