What is the use of an alliance
Alliances are crucial in your gameplay because players can give you resorces and you can recive alot cachs if your alliance is good. Cachs can give alot of useful things like speed ups, hero xp, resorces, outpost vehicles and matirials which can speed up your progress by alot. You can also capture territory which can prevent enemy players from getting close to your allies or to you and your outposts
Pact
Alliances can add something called pacts which would ally your alliance and other peoples alliance and they will be marked as yellow and you should not attack them although it is possible to attack them and that will notify everyone in the attackers alliance that there is a violation of the pact