Tsar Koz'ma the Cruel

Koz'ma the Cruel- (born 1357 in Zerbst/Cervisti; died 1382 in Seversk)was a short reigning tsar of Rus ruling since 1379 to 1382. He was ethnic German.

Life
He was born in the County of Zerbst in the Holy Roman Empire to countess Romilda von Zerbst. He was imprisoned by Duchess of Thurgau as a revange on Zerbst for insulting Duchess Wilhelmina. Tsar Roman I wanted delieverance of Koz'ma from Duchess of Thurgau and Emperor. Kaiser denied, it was start of Russian-German War. Koz'ma was released but Tsar has died during the war, and Koz'ma which was imprisoned for most of his life took the throne. He was tyrant, after white peace with Holy Roman Emperor, he decided to imprison bunch of his vassals and take their titles. He had commited suicide in 1382, and his younger brother, Davyd gained the throne.