coast of Denmark, and Augustus himself boasts in his Res Gestae: "My fleet sailed from the mouth of the Rhine eastward as far as the lands of the Cimbri to which, up to that time, no Roman had ever penetrated either by land or by sea...". The multiple naval operations north of Germania had to be abandoned after the battle of the Teutoburg Forest in the year 9 AD. Julio-Claudian dynasty In the years 15 and 16, Germanicus carried out several fleet operations along the rivers Rhine and Ems, without permanent results due to grim Germanic resistance and a disastrous storm. By 28, the Romans lost further control of the Rhine mouth in a succession of Frisian insurgencies. From 43 to 85, the Roman navy played an important role in the Roman conquest of Britain. The classis Germanica rendered outstanding services in multitudinous landing operations. In 46, a naval expedition made a push deep into the Black Sea region and even travelled on the Tanais. In 47 a revolt by the Chauci, who took to piratical activities along the Gallic coast, was subdued by Gnaeus Domitius Corbulo. By 57 an expeditionary corps reached Chersonesos (see Charax, Crimea). It seems that under Nero, the navy obtained strategically important positions for trading with India; but there was no known fleet in the Red Sea. Possibly, parts of the Alexandrian fleet were operating as escorts for the Indian trade. In the Jewish revolt, from 66 to 70, the Romans were forced to fight Jewish ships, operating from a harbour in the area of modern Tel Aviv, on Israel's Mediterranean coast. In the meantime several flotilla engagements on the Sea of Galilee took place. In 68, as his reign became increasingly insecure, Nero raised legio I Adiutrix from sailors of the praetorian fleets. After Nero's overthrow, in 69, the "Year of the four emperors", the praetorian fleets supported Emperor Otho against the usurper Vitellius, and after his eventual victory, Vespasian formed another legion, legio II Adiutrix, from their ranks. Only in the Pontus did Anicetus, the commander of the Classis Pontica, support Vitellius. He burned the fleet, and sought refuge with the Iberian tribes, engaging in piracy. After a new fleet was built, this revolt was subdued. Flavian, Antonine and Severan dynasties During the Batavian rebellion of Gaius Julius Civilis (69–70), the rebels got hold of a squadron of the Rhine fleet by treachery,