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Particularly, the famous Moldavian coup-d'etat when the Zaporizhian leader Ivan Pidkova overthrew the Ottoman-installed Hospodar of Moldavia Peter the Lame in 1577 under a pretense of being related to the beheaded brother John III the Terrible.
Ioan al IV-lea Potcoavă (or Ivan Pidkova – Іван Підкова in Ukrainian; also known as Ioan Sarpega, Ioan Creţul, and allegedly baptized as Nicoară Potcoavă; died June 16, 1578) was a prominent Cossack ataman, and Voivode (Prince) of Moldavia (November – December 1577).