the Marcomanni had come to be settled in the forested regions once inhabited by the Boii, in and around Bohemia, under his rule. Augustus planned in 6 AD to destroy the kingdom of Maroboduus, which he considered to be too dangerous for the Romans. The later emperor Tiberius commanded twelve legions to attack the Marcomanni, but the outbreak of a revolt in Illyria, and the need for troops there, forced Tiberius to conclude a treaty with Maroboduus and to recognize him as king. Roman defeat in 9 AD After the death of Drusus, the Cherusci annihilated three legions at the Battle of Teutoburg Forest and thereafter "... the empire ... was checked on the banks of the Rhine." While elements of the Suevi may have been involved, this was an alliance mainly made up of non-Suebic tribes from northwestern Germany, the Cherusci, Marsi, Chatti, Bructeri, Chauci, and Sicambri. The kingdom of the Marcomanni and their allies stayed out of the conflict and when Maroboduus was sent the head of the defeated Roman leader Varus, he sent it on to Rome for burial. Within his own alliance were various Suebic peoples, Hermunduri, Quadi, Semnones, Lugii, Zumi, Butones, Mugilones, Sibini and Langobards. Aftermath of 9 AD Subsequently, Augustus placed Germanicus, the son of Drusus, in charge of the forces of the Rhine and he, after dealing with a mutiny among his troops, proceeded against the Cherusci and their allies, breaking their power finally at the battle of Idistavisus, a plain on the Weser. All eight legions and supporting units of Gauls were required in order to accomplish this. Germanicus' zeal led finally to his being replaced (17 AD) by his cousin Drusus, Tiberius' son, as Tiberius thought it best to follow his predecessor's policy of limiting the empire. Germanicus certainly would have involved the Suebi, with unpredictable results. Arminius, leader of the Cherusci and allies, now had a free hand. He accused Maroboduus of hiding in the Hercynian Forest while the other Germans fought for freedom, and of being the only king among the Germans. The two groups "turned their arms against each other." The Suebic Semnones and Langobardi rebelled against their king and went over to the Cherusci. Left with only the Marcomanni and Herminius' uncle, who had defected, Maroboduus appealed to Drusus, now governor of Illyricum, and was given only a pretext of aid. The resulting battle was indecisive but