Picked CK2 up again recently and got the Normans started early.
Started off as Sverker Skarfr, custom ruler of Medelpad in 769. Aggressively county-conquested the one-province minors around me in northern Sweden and Lapland until I had a power base sufficient to take on Sigurdr Ring to the south of me in a pinch. Once he got tied up in a war with someone else, I used my King-of-Sweden subjugation on him and conquered his (large) duchy, then took his capital for my own and moved in. From there, spent my first tech points buying shipyard tech, bought my first 15 ships and started the Viking Age a few years early, using the raid income to form Sweden. Spent the next few years - and the passing of the throne from Sverker the Butcher to his only son Grimr - building up a huge war chest and a pile of prestige through raiding.
Eventually, with a vast demesne and a huge army at his disposal thanks to demesne consolidation, Grimr was in a position where he could field an army of men equal to the King of the united Francias - a son of Pepin the Hunchback, as it happened. Ever ambitious, Grimr gathered the largest raiding party ever gathered in the history of the Norse and declared his intention to "go to Valland." Upwards of 17,000 men landed on Frankish shores in the late 810s; while they began with a landing in Frisia, they steadily crushed the armies of Francia, Lombardy and the Counts of Armorica and conquered their way along the coast, eventually seizing all of the northern part of Francia and banishing the Carolingians to Austrasia. Grimr, who had adopted the ways of the Catholics, declared himself High King of Valland and Sweden, made his capital in Brugge, and passed on the thrones to his son, Sverker the Magnanimous. In turn, Sverker finally settled in Valland completely and granted reign in Sweden to his trusted general, Hjalmar Thvari, effectively splitting the kingdom.
It was Sverker's son, born Hrolfr but known to history as Rollo (847-877), who embraced the Frankish language and ways and became the primary patron of Norman culture. Rollo was the first member of the line of Sverker the Butcher (the House of Écarve these days) to be born in Valland, and he grew up with a deep appreciation for the local culture and religion - though he was also renowned for his sympathy for the Jews, particularly after his great pilgrimage to the Holy City itself. Under Rollo and his son Joscelin I (877-902), the hybrid culture enjoyed a vast renaissance, forming a distinct culture unto itself.
It's now the 980s and Valland runs from Poitou to Armorica and along the coast to Denmark. The Carolingians are extinct, and the Anglo-Saxon House of Wiglafing rules in Aquitaine, Burgundy and Germany. Similarly, Asturias is ruled by the Anglo-Saxon House of Offing, while Italy is ruled by Frankish kings over a nobility mostly consisting of Italo-Lombards.
Sweden, meanwhile, fell on dire straits following the House of Écarve's departure. A vast backlash against Christianity resulted in the kingdom being eaten piecemeal not just by the surrounding Norse Pagans, but by the rising Lettigalians across the Baltic. For most of late 800s and up to about 970, most of Scandinavia was broken between Lithuania, Lettigalian Pomerania, Norway, Novgorodian Rus' (under the Radimich clan) and the Kabars, a breakaway nomadic group ethnically related to the Khazars, who at one point managed to subjugate Lithuania and all her holdings in Scandinavia. The dominant ethnic makeup in Norway consists of a mix of ethnic Scandinavians as well as Balts who have adopted Norse culture, most of whom follow Baltic paganism.
That's changed somewhat under the reign of King Gerard the Wise of Valland (970-983, ongoing). With Sweden fractured, Gerard swept into the peninsula early in his reign and seized back many of his ancestors' homelands. Most of the Norse Catholics had been wiped out, aside from the Thvari clan holding on in Croatia; in his search for Christians to entrust these lands to, Gerard put his faith in Ihanti Hannus, an ethnic Finn who had adopted Norse ways and Byzantine Christian beliefs. After giving him a crash course in the Latin Rite, Gerard set him up in Scania and began to conquer most of Sweden, eventually handing it to the House of Hannus and starting off the reign of the Fenno-Norse in Sweden.
The Middle East has been a gong show. The Abbasids have had about six decadence revolts, resulting in the Middle East being an insane patchwork. And a particularly punchy Shia revolt managed to take all of western Anatolia and even Bulgaria and Greece for awhile before now being reduced to Anatolia and Syria.