This is very anticlimactic. I waited so long in anticipation for the Mongols to arrive so that they can rip apart an Empire and they get there and they huddle up at the very top of the map. The Kwar gathers all of its stacks and they just stare each other down. A staredown that can lasted about 12 years now... No movement at all. Sucks. I just hit 60 settlements too and am getting bored of my campaign.
Will this happen next campaign, by that I mean, is it often? The next campaign relies on Mongols being an active, aggressive faction and it will kill it if they just chill out again.