Page "Boleslaus II, Duke of Bohemia" Paragraph 3

The son of Boleslaus I and Biagota, Boleslaus II became Duke ( or Prince ) on his father's death.

Boleslaus maintained good relations with the Ottonian German kings, and in 975 supported Otto II during the civil war against Henry II, Duke of Bavaria.

In 977, Boleslaus again attacked Bavaria, but on this occasion was barred from annexing any lands by Otto II.