Croatian hussars were irregular light horsemen characteristic of the Habsburg-Ottoman border area. Croatian units were not inevitably referred as "Croats" but it was the most commonly used name. &lt;/ref&gt; Croatian hussars participated in the siege of Magdeburg which was led by Johann Tserclaes as well as the sieges of Heidelberg, Frankenthal, Manheim, Breitenfeld, Lützen, Nördlingen, Wittstock and Breitenfeld.