That same year, Herman II accompanied Emperor Otto III on his second Italian campaign.
[5] According to the chronicler Thietmar of Merseburg, the majority of the German nobles, who assembled at Aachen in April 1002, including the influential Archbishop Heribert of Cologne, supported Herman II.
He undertook military action against Henry and his supporters, including at Strasbourg, where Herman's men looted the episcopal church.
Herman accepted Henry's kingship and promised to make reparation for the damage that had been inflicted on Strasbourg.
[7] In Christmas 1002, Herman was present at the imperial court at Frankfurt, signalling that he was on better terms with Henry II.