Together with the Dragoons and Uhlans, the Imperial and Royal Hussars (German: k.u.k. Husaren), made up the cavalry of the Austro-Hungarian Army from 1867 to 1918, both in the Common Army and in the Hungarian Landwehr, where they were known as the Royal Hungarian Hussars (k.u. Husaren).
The Austrian monarchy, weakened by the losing the war against Prussia in 1866, had to effectively guarantee the autonomy of Kingdom of Hungary in the so-called Compromise of 15 March 1867. As a result, the Hungarian half of the Empire immediately began to establish its own army, the Royal Hungarian Landwehr (Hungarian: Magyar Királyi Honvédség). The cavalry of the Hungarian Landwehr was made up of the Landwehr Hussars.
Following the signing of the Compromise, the Austrian half of the Empire also started to build an army, the Imperial-Royal Landwehr (German: k.k. Landwehr). The two new Landwehr forces thus existed alongside the Common Army (Gemeinsame Armee), the imperial army of the whole Empire. In effect this meant that Austria-Hungary had three separate armies at the same time.
The Common Army had 16 hussar regiments and the Royal Hungarian Landwehr had ten. By tradition, the majority of the hussars were recruited from the Hungarian lands, parts of which belong today to Serbia, Romania, including Transylvania and Banat, Croatia and Slovakia (socalled Upper Hungary). The regiments, with a few exceptions, were all stationed there.