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 commenced during the tenure of Garibald I's predecessor, Tassilo, when Garibald forged a marriage pact with the Lombards. The fate of Garibald remains uncertain, whether he died or was ousted.