Slavonia 867-893 : Under the Avars' yoke

Yeah so today in History,

The young Croatian Kingdom (est. 874 by Domagoj, Ban of Croatia, right befire submitting Slavonia into vassality) was under the threat of two eastern, turkic superpowers : the old Avar Khanate, which had settled in the northeastern edge of the Pannonian Plain since Roman times, and were trying to keep in check the migration of Slavs into their dominion, and the young Magyar horde, which had decided to migrate westwards after being roughed by their Khazar overlords.

So when the Magyars swept through the lands of the Slavs around the Avars, it seemed Croatia wouldn't stand in the path. Suprisingly, the Magyars contended themselves with one northern province, and it was the Avars that declared war and subjugated King Domagoj's heir.
This is how I, the Ban of Balaton to the North of me and the Ban of Croatia to the South, became all subjects to the Avar Khanate, who soon enough settled [ie in-game, it became a regular country and not a horde) to be the Khanate of Hrvatska (Croatia).
After this point, it was just a matter of time before the Magyar eventually came round to conquering one by one the eastern provinces of the Khanate, which is to say the region where the Avars used to prosper before the whole affair.

On the interior side, during all this chaos, Ban Braslav I died, and his grandson Braslav II inherited after a short regency. Braslav II had been shortly betrothed to a Burgundian princess, then to a Lombardian Princess, Heilka, while his grandfather had his sights turned to the West.
Now that he had been Croatian, then Avar, then Avar-Croatian, and had had to defend his title against plots in his own surroundings, Braslav II decided to focus on his Pannonian ambitions, for which Queen Heilka was of little interest. As his grandfather had sequestrated two daughters from Slavomir, the Pannonian chief of Tolna, immediately to the North of his own capital of Vukovo, he schemed to have his queen murdered to be able to marry Slavomir's elder daughter, Brzieczislawa, who was of a deceitful nature like himself, while offering the younger sister Przybislawa to a young vassal, Baron Dragan.
The scheme seemed even better off when the queen, along with her two children, was abducted by revolting Christians (the Avars follow the old Turkic faith, centered on their god Tengri) who couldn't bear the pagan yoke.
They were not the only ones, eventually, as all the former vassals of the Croatian King rose in rebellion against the Khan. I chose not too, counting on the Avar might to slaughter my fellow Croats, who had been wiped out easily in the first place. They turned out to be many more than i thought, and the victory of the Khan (and my hundred warriors) held to a strategic error by the rebels. They soon submitted and all went back to feebly resisting the Magyar multitude snagging territory after territory.
In the aftermath of one of the invasions, the chiefdom of Tolna had passed to another lineage and Brzieczislawa's claim seemed a lot less promising. Meanwhile, Queen Heilka had born a third child to Braslav, and he resolved to drop his scheming, and go on living with her. It was the year of the Lord 893.