Between AD 14 and 16, Germanicus led punitive operations into Germany, fighting Arminius to a draw in the Battle at Pontes Longi and twice defeating him (according to Tacitus): first in the Battle of Idistaviso and later at the Battle of the Angrivarian Wall. In AD 15, Roman troops managed to recapture one of the three legionary eagles lost in the Battle of the Teutoburg Forest. In AD 16, a second eagle was retrieved. Tiberius denied the request of Germanicus to launch an additional campaign for AD 17, however, having decided the frontier with Germania would stand at the Rhine river. Instead, he offered Germanicus the honor of a triumph for his two victories. The third Roman eagle was recovered in AD 41 by Publius Gabinius, under the emperor Claudius. Arminius also faced opposition from his father-in-law and other pro-Roman Germanic leaders. His brother Flavus, who had been raised alongside him in Rome, remained loyal to the Roman Empire and fought under Germanicus against Arminius at the Battle of Idistaviso. With the end of the Roman threat, a war broke out between Arminius and Marbod, king of the Marcomanni. It ended with Marbod fleeing to Ravenna and Roman protection, but Arminius failed to break into the "natural fortification" of Bohemia, and the war ended in stalemate.