He fought a duel with the Spanish General Montenegro and was severely wounded, but recovered.
Here he put to use his substantial oratorical skills, though frequently using them to dazzle rather than enlighten, and his demeaning characterizations of the left earned him a poor reputation in those quarters.
When the uprising broke out on 18 September in consequence of the parliament's decision regarding the truce of Malmö (in the debate for which Lichnowsky had spoken in very conciliatory terms), disdaining all warnings, he rode out with General von Auerswald to meet the troops arriving from Württemberg.
A group of upset citizens recognized them on the Bornheimer Highway and chased them.
Von Auerswald was shot to death and Lichnowsky beaten up and died the next day in Baron Bethmann's villa in Frankfurt.