Sich Rada Highest Branch of Government

The Sich Rada (Ukrainian: Січова Рада, Sichova Rada) was the highest branch of government of the Zaporozhian Cossacks, and based at their center, the Zaporizhian Sich. It was also called Viyskova Rada (Military Council). The Rada, a type of governing committee but with participation from the cossack members, was involved in legislative, executive and judicial matters.

Interesting branch, never heard of it before