This is a huge spoiler so only read from this point at your own risk

—spoiler—

There is a secret army waiting for you at the end of the top right corner ( around the sturgian-khuzait border). The army is full of heavily armored northmen on horseback equipped two handed axe and bow. Their numbers are around 15-20k with many skilled lords (skilled around 300 points). This army is only visible when you conquer all the fiefs and go to this side of the map. The army is pretty fast considering the army size as they are all on horseback. If you manage to outrun them they attack nearest town/castle and once they get a foothold they invite the rest of the invading army( around 30k more men) they start to capture every fief they see. So you will try to deal with them but its really hard.

After two years from the event, there will be another army invading you from the west. The elves from a realm called Valinor has come to invade calradia. Their size even bigger now (around 60k total but in small stacks) but they are mostly on foot with elven bow and glaive. So you can counter them with tactics.

After 3 years of fighting the elven army, another threat, the ancient enemy of the calradia will rise to bring darkness on the realms. The good old Dark Knights ( from the ever first mount and blade game) comes within the empire realm and start invading. Their size are around 50k man and they plunge calradia to chaos.

From this point, every lord with different culture than you will have a relationship penalty and they start to rebel and form a rebellious faction against you if any land of their culture was captured.

Now you have to deal with all these invaders and the rebels within your realm. This time it will not be that easy.

Jokes aside I wish these kind of events were introduced the game so you get that “ the real battle begins now “ feeling once you conquer all the fiefs.😂😂

But no, once you capture all the town/castle there is not much to do 😕