Cossack infantry was the main branch of the military in the Zaporizhian Host (the Ukrainian Cossack army) during the 16th to 18th centuries. It was known for its high combat effectiveness and battlefield skill. Cossack infantry played a key role in land campaigns, employing a variety of weapons and tactics. It was typically arranged in three ranks: the first fired, the second passed loaded rifles, and the third reloaded them.