After 1465 one of the last chieftains from the house of Cirksena was made a count by Emperor Frederick III and accepted the sovereignty of the Holy Roman Empire. However, in 1514 the emperor ordered that a duke of Saxony should be the heir to the count of East Frisia. Count Edzard of East Frisia refused to accept this order and was outlawed. Twenty-four German dukes and princes invaded Frisia with their armies. Despite their numerical superiority they failed to defeat Edzard, and in 1517 the emperor had to accept Edzard and his descendants as counts of East Frisia.