Alliances are agreements between faction to combine their strengths and aid each other whenever called. To create an alliance, either post a comment on the faction's page, and detail your request, or send a private message to the leader of the faction.
Listed below is the current list of alliances in this server.
Gondor: The Rangers, Erebor, Rohan (Resistance)
Rohan (Resistance): The valar (Temporary), Gondor, Dol amorth.
Rohan (Loyalists): Isengard
The harad empire is technically a alliace of 4 factions
Blue Dwarves - All of Durin's Folk - Dunland And High-Elves
(If you spot an alliance that I haven't added, feel free to add it in.)