Shinigami in the Ninja World - What If 13: Plan, Irrelevant and Implementation

... latively stable.

Though there were occasional cases of defection or infighting, they were rarely orchestrated by anyone truly formidable. None of these incidents required Sasuke Uchiha to use his Mangekyō Sharingan.

However…

Even the 2nd Division was not entirely peaceful.

The shy girl who had once served under Yoruichi Shihōin turned out to have remarkable talent. Shortly after Sasuke became the Captain of the 2nd Division, she successfully mastered Shunkō.