 Aside from fighting along the Austrian border in 1919–20 related to territorial disputes, and some border skirmishes on its southern borders in the 1920s, the JV was not involved in fighting until April 1941 when it was quickly overcome by the German-led invasion of Yugoslavia.Shortly before the Axis invasion of Yugoslavia, certain high ranking army and airforce officers, backed by Great Britain, staged a coup against the Yugoslav monarchy on 27 March.Beyond the problems of inadequate equipment and incomplete mobilization, the Royal Yugoslav Army suffered badly from the Serbo-Croat schism in Yugoslav politics.