A new generation of statesmen and military leaders came to the forefront: Ivan Vyhovsky, Pavlo Teteria, Danylo Nechai and Ivan Nechai, Ivan Bohun, Hryhoriy Hulyanytsky. From Cossack polkovnyks, officers, and military commanders, a new elite within the Cossack Hetman state was born. Throughout the years, the elite preserved and maintained the autonomy of the Cossack Hetmanate in the face of Russia's attempt to curb it. It was also instrumental in the onset of the period of Ruin that followed, eventually destroying most of the achievements of the Khmelnytsky era.