How to see who you're at war with?

[cykro]

I'm a vassal and I honestly have no idea who we're at war with.
The relations is a hint maybe, but I dont consider them hard evidence

Is there a list to check somewhere?

 

[TheDave]

Check the page for each faction, at the bottom it tells you who they are at war with, in truce etc

 

[Samilou]

You can also ask a lord of your faction who is at war with the faction.