When in war together, my AI allies, colonies and vassals tend to do stupid things such as using their main fleet to blockade a single port, or right-out commanding their army home for tea time, all while my force is slaughtered by enemy stacks of doom. In situations where huge stacks are required, I often attach to an allied force in the hope that it will do something useful, but most of the time it is in vain. This is giving me a major headache, and I've lost countless wars to it.

So... is there a way to control allied armies and navies, for example by making them attach to my stack?

Internet research hints at the "Attach to this unit?" checkbox, but unfortunately it doesn't have a tooltip, and I haven't managed to get it to work. I've done some experimentation, and in the most successful case I got an army to follow me for two provinces before abandoning me. In all other cases, I was simply ignored.

Finally, once these basic issues are solved: Is there a way to transport allied troops over an ocean?


2 Answers 2


There's really no way to directly order around the AI armies, and you can't order them into any of your transports. The best thing to do is usually just to let them do their thing (save yourself the trouble of sieging the provinces close to your allies or rushing headlong into a doomstack) while you send your guys in to do the bulk of the work, like heading straight for the capital or harassing any new stacks that pop up.

  • Unfortunate, as this is a defensive war and the enemy doomstack is heading straight for my capital... what about the "Attach to this unit?" checkbox?
    – mic_e
    Commented Jul 13, 2014 at 9:27
  • @mic_e The "attach to this unit" basically joins one of your units to an allied unit, under their command. You surrender the control of the army to them; you cannot control units that are not yours. However, some times, allies choose to join their forces with yours. They will then follow you around untill they get tired of it. Here is an explanation of the feature in Crusader Kings 2, the UI and function is similar. gaming.stackexchange.com/questions/122190/…
    – Nix
    Commented Jul 31, 2014 at 11:31
  • 2
    @Nix that's completely wrong... It attaches the AI army to yours brah.
    – Harry
    Commented Aug 3, 2014 at 5:53
  • @Harry That doesn't sound right, dawg. Could you please document it and post as an answer? It's basically what OP needs.
    – Nix
    Commented Aug 4, 2014 at 7:57
  • 3
    @Nix OP already knows about it. But it's unreliable because the AI treats it as a suggestion instead of a rule. But it works frequently enough.
    – Harry
    Commented Aug 4, 2014 at 18:02

With the Art of War DLC it is possible to give allied objectives which influence the actions of AI allies and subjects in wars. These are split into two types:

  • Province objectives are handled from the province screen and allows the player to tell their AI allies to focus on specific enemy provinces. This will both make them more likely to send armies to besiege that province and to engage enemy armies that are located in it.
  • Subject military focuses are handled from the subjects screen and allow the player to change the military priorities of their subject nations to either aggressive or supportive.
    • Aggressive subjects will not attach to your armies and will instead focus on their own operations, engaging enemy armies and besieging their provinces.
    • Supportive subjects will behave in the opposite fashion, attaching to or staying near friendly armies and avoiding independent operations in enemy territory.
    • If you have no military focus set, they will attempt to judge for themselves when it is best to attach and when it is best to act independently.

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