His regiment the Oleśnica Silesian Hussars being stationed, at that time, near the residence of Eugen's relatives, part of the Duchy of Oels.

On 18 October 1806 he fought at the Battle of Halle where he was defeated by Marshal Jean Bernadotte (later became King Charles XIV John of Sweden).

The Duke was a great patron of the composer Carl Maria von Weber, who became his secretary and in September 1806 he was designated as Kapellmeister at Carlsruhe.

Eugen's son, distinguished himself in the War of the Sixth Coalition which led to the theater being closed, and Carl Maria von Weber dismissed.

From 1820 until his death Eugen was a member of the First Chamber of the Estates of Württemberg though he never appeared in person to the meetings, being represented by Count Charles of Reischach.