Making alliance?

[Delpnaz (O_o)™]

I am playing single player,
is it possible to create alliances with other clans?
Or we are all enemies by default.

[Bolt]

Single player what ?

• Campaign ?
  
• Conquest ?
  
• Skirmish ?

You can only ever set up teams before the match and then it stays like that. The campaign is always you vs them and in general you'll know you have an ally when the minimap has shared sight with another faction's HQ. Conquest has mostly enemies in their own teams, meaning they may fight another and sometimes it's just you vs multiple AIs.

[Cortez]

If you trade with them they are less likely to want to attack you, and if they trade with you back youre basically allies in a way, you just cant enter their territory as it will be declaration of war. You can also choose at the start of the game if you want to start with alliance or not. theres many options like 4v4 or 2v2v2v2 and such

[Bolt]

Originally posted by Cortez:

If you trade with them they are less likely to want to attack you, and if they trade with you back youre basically allies in a way, you just cant enter their territory as it will be declaration of war. You can also choose at the start of the game if you want to start with alliance or not. theres many options like 4v4 or 2v2v2v2 and such

"Soured relations" only means that you can't trade with the faction you attacked or that attacked you for some months. The AI exists in two states: aggressive and non-aggressive. Aggresive is what you get in some conquest missions in which the AI ignores the selected difficulty, typically the ones with "kill x of enemy before anyone else", and some others. If on aggressive the AI will use its entirely cheated economy, that it always receives, to build military structures everywhere and roll right over you because it's a massive cheater that also gets all of its military units, including warchief, for free. Only resources it gets from mining are such it actually needs to gather. You can trade all you want with an aggressive AI but it'll still attack you, just the same as it attacks neutrals it tried to befriend before just to get more territory for military structures.

Contrary to that an AI that isn't set to aggressive will try to befriend neutrals and only attack them if you would befriend them first otherwise (only seen with giants and dwarfs so far). Such an AI will allow kobolds to wall its territories off so that it can't proceed to anywhere on the map if this just so happens to be the map layout. It may seem as if such an AI doesn't attack you because you're trading with it but it's really just the low aggression setting. It merely tries to get all the territories with neutrals or no enemies first, aiming for valuable ones, especially territories with deposits or food sources. If you have such it'll come for those once it runs out of neutral areas, unless an area of another enemy is closer and less defended. Any outer territory that lacks a tower may trigger an attack from an AI even from afar. It may also try to attack while your units are far away or busy fighting another army. If you're close to a victory condition the AIs may also try to attack you. If any AI gets a large army it'll try to use it and not remain passive or friendly if it can reach an enemy.

While it would be nice to have trading affect the AIs it doesn't even affect the neutrals. I can't count the times I've given the Myrkalfar yet another chance to not be a$$holes, tried to befriend them, only for them to start an attack against me shortly after.