Duke Eric II of Schleswig was a nobleman who ruled in the late 14th century. He was part of the House of Schauenburg and held the title of Duke of Schleswig from 1375 until his death in 1459. His reign was marked by efforts to strengthen his territory and maintain peace in the region. Eric II was also known for his involvement in the politics of Denmark and Germany. He played a significant role in the conflicts and alliances of his time, navigating the complex relationships between various noble families and kingdoms in Northern Europe.