then that the magister equitum, Theodosius the Elder and his son Theodosius (the Theodosi) attacked the Alamanni through Raetia, taking many prisoners and resettling them in the Po Valley in Italy. Valentinian made one attempt to capture Macrianus in 372, but eventually made peace with him in 374. The necessity to make peace was the increasing threat from other peoples, the Quadi and the Sarmatians. Valentinian's decision to establish garrisons across the Danube had angered them, and the situation escalated after the Quadi king, Gabinus, was killed during negotiations with the Romans in 374. Consequently, in the autumn, the Quadi crossed the Danube plundering Pannonia and the provinces to the south. The situation deteriorated further once the Sarmatians made common cause inflicting heavy losses on the Pannonica and Moesiaca legions. However, on encountering Theodosius' forces on the borders of Moesia in the eastern Balkans, which had previously defeated one of their armies in 373, they sued for peace. Valentinian mounted a further offensive against the Quadi in August 375, this time using a pincer movement, one force attacking from the northwest, while Valentinian himself headed to Aquincum (Budapest), crossed the Danube and attacked from the southeast. This campaign resulted in heavy losses to the enemy, following which he returned to Aquincum and from there to Brigetio (Szőny, Hungary) where he died suddenly in November. When his father died on 17 November 375, Gratian inherited the administration of the western empire. Days later, Gratian's half-brother Valentinian was acclaimed augustus by troops in Pannonia. Despite Valentinian being given nominal authority over the praetorian prefectures of Italy, Illyricum, and Africa, Gratian ruled the western Roman empire himself. Following his death, Valentinian's body was prepared for burial and started its journey to Constantinople, where it arrived the following year, on 28 December 376, but was not yet buried. He was deified, as was the custom, becoming known in . With the death of Valentinian I, in the east Valens became the senior augustus and the 16 year old Gratian was the only augustus in the western empire. To complicate matters further for Gratian, certain among Valentinian's generals then promoted his four-year-old second son Valentinian II (Gratian's half brother), the army on the Danube acclaiming him augustus in a palatine coup at Aquincum (Budapest) on 22 November 375, despite Gratian's existing prerogatives. The young Valentinian II was essentially the subject of the influence of his