Hetman is a political title from Central and Eastern Europe, historically assigned to military commanders (comparable to a field marshal or imperial marshal in the Holy Roman Empire). First used by the Czechs in Bohemia in the 15th century, it was the title of the second-highest military commander after the king in the Crown of the Kingdom of Poland and the Grand Duchy of Lithuania from the 16th to 18th centuries. Throughout much of the history of Romania and the Moldavia, hetmans were the second-highest army rank. In the modern Czech Republic, the title is used for regional governors.