Since the game is still in the Early Access, the default Declare War option hasn’t been activated yet. But there is a way around that.
How to Declare War in Mount and Blade 2: Bannerlord
The only way to declare war in the current state of Mount and Blade 2: Bannerlord is to raid and loot villages or caravans that belong to the kingdom you wish to fight.
Follow these steps to start a war with the faction/kingdom:
Make sure that your own city is close enough to the faction you wish to attack Raid any village or caravan that is close to the castle or city with the garrison you wish to go to war with Allow the enemy kingdom to attack your city Start the war
If you choose a kingdom that is too far from your own, they will be mad at you, but will not send their troops to attack you.
You also have to be prepared to lose 200 influence points for raiding a village or a caravan.
Lastly, make sure that you have enough troops to withstand the initial attack of the enemy faction, so you can respond accordingly and win the battle.
That’s all on how to declare war to an enemy kingdom in Mount and Blade 2: Bannerlord. For more Mount and Blade 2: Bannerlord guides, check out the list below:
How to Start Your Own Kingdom How to Execute Prisoners Best Companions and Their Locations How to Make Workshops Profitable CPU Temp Spike Fix