Soon after his official searing in as monarch, King Zog broke off his engagement to Shefqet Vërlaci's daughter, and Vërlaci withdrew his support for the King and began plotting against him. Zog had accumulated a great number of enemies over the years, and the Albanian tradition of blood vengeance required them to try to kill him. Zog surrounded himself with guards and rarely appeared in public. The King's loyalists disarmed all of Albania's tribes except for his own Mati tribesmen and their allies, the Dibra. Nevertheless, on a visit to Vienna in 1931, Zog and his bodyguards fought a gun battle with would-be assassins on the Opera House steps (see ).