1. The Cossacks were mostly serfs who escaped from their masters.
2. Many people were looking for a better life.
3. The Cossacks defended their land from enemies.
4. Harsh environment made Cossacks firm and courageous.
5. The first permanent fortification was built by Vishnevetskii.
6. Zaporizhzhya Sich was first democratic society in Europe.
7. Cossack army was rather bold.
8. The Cossacks lived by their own laws.
9. First hetman was Dmytro Vishnevetskii.