The war began during the reign of Tassilo's predecessor, Garibald I, when Garibald concluded a marriage alliance with the Lombards. We do not know whether Garibald died or was deposed.
The war started during the time of Tassilo's predecessor, Garibald I, when Garibald formed an alliance with the Lombards through marriage. However, it is unclear whether Garibald met a fatal end or was removed from power.