Under pressure from the Franks, who—under Byzantine employ—invaded Italy again in 584, the Lombards elected Duke Authari as their king, who defeated the intruders. When the next Frankish imposition occurred in 588, it proved a fiasco for the invading forces since both Authari's Lombards and Garibald's Bavarian forces were allied and defeated them accordingly. Additional imperial tactics of paying one barbarian group to fight another came into play when the
Alemannic mercenary commander
Droctulf was persuaded to abandon the Lombards and join the imperial forces in assailing his former confederates. However, Authari overcame Droctulf's forces—Authari was later celebrated for retaking
Classis from the Lombards—and Droctulf retreated to
Brescia and Ravenna. Then in 590, the Frankish envoy Grippo led another combined imperial and Frankish army against the Lombards. Their intention to drive them from Italy, but after capturing
Modena,
Mantua, and
Altino, had to stop at the Lombard capital at
Pavia upon learning that the Frankish leader Cedinus had signed a ten-month truce with King Authari, which forced them to return to
Gaul. As a result of this and other debacles across the empire,
Constantinople and the reestablished imperial western empire at
Ravenna were required to come to terms with the permanent presence of the Lombards in Italy. ==Religion and marriage==