In the 1330is the Hungarian royal famili was anjou. Hungary was one of the most powerful nations at that time so that branch of the anjou famili could conquer the habsburgs. In fact if i know it corectli the hungarian kings in the XII and XIII th century liked to burn Viena down
It's a wonder that Hungary was powerful in the fourteenth century given the mess that was made of the country when the Mongols invaded in the thirteenth.