He joined the army of Habsburg Austria and fought against the Ottoman Turks, winning a prestigious award for bravery.

In the 1790s, he served in the wars against the First French Republic and received promotion to general officer.

During the Napoleonic Wars he led a division in 1805 and an army corps in 1809.

He was the Proprietor (Inhaber) of an Austrian light cavalry regiment from 1801 until his death.

[1] At the Battle of Wagram, Rosenberg commanded the IV Armeekorps on the left flank.