"attacked and occupied Vidin" . . "conquering Vidin" . "invaded northwestern Bulgaria" . . . ":Hungarian occupation of Vidin" . . "occupied Vidin" . . "occupied Ivan Stratsimir's realm" . "Vidin, Hungarian occupation of" . "Hungarian-occupied Vidin" . "Vidin was occupied" . "retake Vidin" . . "Hungarian occupation of Vidin" . . "Hungarian occupation of Vidin" . "state was occupied" . "Bulgaria" . "was occupied" . "seized Vidin province" . . "region was under Hungarian rule" .