Galan Venutus, Tribal Chief of Taexalia, was a young ambitious Pict with dreams of expanding the lands and wealth claimed by his fellow tribesmen. It wasn't too long after taking power that he eyed his northern neighbor and pounced. With three other clans behind him, Venutus easily absorbed his fairly weak foe.
Separated from the rest of the world by sea or undeveloped land, Galan began sending tribesmen out to settle nearby territories. Once he found himself bordering an actual tribe for once Galan took a look at the political situation. A very large tribe, Votadinia, was beholden to a tribe, if you could call it that, with the single holding of Veluniate bordering Taexalian land. Galan smoothly befriended the Votadinian chief and pounced. With freedom on the line, and good relations with the invaders, the larger tribe sat back as Taexalian charioteers and infantry trampled their oppressors.
However during this brief war Segovax Ursus, Chief of the Urcii, got too big a head and showed his true colors - with a force consisting of 1/3 of the Taexalian army he opted to sit back and watch the war from a distance. A fourth clan rose to prominence as well during this period, somewhat reducing the threat of Ursus disloyalty. Segovax repeatedly demanded changes to laws and "donations" of men and money, and his family was consistently involved in disputes with the other clans. In response Galan replaced all the Ursii with important titles that he could in an attempt to humble the clan. The issues with Ursii only increased in frequency from there, but there wasn't much else Galan was willing to do to them.
When Segovax died at 75 years of age on 3 Aug. 494 he was replaced by Brenwen Ursus, his equally disloyal (sister?). Without an army behind her yet, Galan was able to arrest her and put her to the sword for the crimes of Segovax as well as herself. The next head of the clan was Segovax' daughter Vassura. She had initially been on good terms with the aging Galan, but eventually she too grew too full of herself. Unable to move against her directly, Galan decided to strike out at the rest of the Ursii. He bided his time, securing the loyalties of the other clan chiefs (and a case of gout) before the first wave of purges - those of the family who weren't Vassura and her two sons. During the purge Galan acquired the title 'the Wolf'.
On 25 Dec. 503, having had to deal with consistent disputes involving the Ursii, Galan made the decision to execute the 53 year old chief's sons.
Galan passed away the next September, at peace with himself and the knowledge that while he would be gone, the other clans would outlive the treacherous Ursii.
tl;dr playing a small settled tribe feels closer to CK2 (whereas the larger countries feel more EU-ish) Had fun, would purge a clan again.