Lüne (Latin: Hliuni) was a location on the left bank of the lower Elbe, known in connection with the Saxon war of 795.
Some Transelbean Saxons refused to heed the summons and Charlemagne marched into Saxony, encamping at Lüne while waiting for his Obodrite allies to join him.
When he heard that the Saxons had, as usual, broken their promise to accept Christianity and keep faith with the king, he entered Saxony with an army and reached the Elbe at Lüne.
They declared that this tudun wished, with his land and people, to submit to the king and on his instruction accept the Christian faith.
Once the Saxons had been soundly beaten, their country laid waste, and their hostages received, the king returned to Gaul and celebrated Christmas and Easter at the palace of Aachen.