1015. The emperor again went with an army against the Poles.1
1032. ... while the emperor was leading an army against Miesco, the king of those Slavs who are called Poles, ...2
1050. The emperor prepared an expedition against Casimir, duke of the Poles, who was planning a rebellion. He was, however, held back by a serious illness and received him when he requested peace and a treaty and departed.3
1109. [King Henry] led an army against the Poles, a distant people, and after he had laboured hard there for a long time he collected the long-denied tribute owed by that country.4