The Ubii were a Germanic tribe first encountered dwelling on the right bank of the Rhine in the time of Julius Caesar, who formed an alliance with them in 55 BC in order to launch attacks across the river. They were transported in 39 BC by Marcus Vipsanius Agrippa to the left bank, apparently at their own request, as they feared the incursions of their neighbors the Chatti There Agrippa founded the city of Cologne as their capital, the Oppidum Ubiorum (modern Cologne) whose Latin name Colonia Ag… (More on Ubii)