Leopold IV, Duke of Austria was a member of the House of Babenberg, born in 1386. He ruled as Duke from 1411 until his death in 1421. Leopold IV was known for his efforts to strengthen the power of the duchy and expand its territories. He was also involved in various military campaigns during his reign. Leopold IV was the son of Leopold III, Duke of Austria and Viridis of Switzerland. His reign was marked by political challenges, including conflicts with neighboring regions. After his death, he was succeeded by his son, Frederick IV, Duke of Austria, who continued his father's legacy.