Explanation:

In the spring of 9 BCE Drusus, this time as a consul, again led the troops deep into Germania. He attacked and defeated Khatts, Swabians, Marcomanni and Cherusci. He crossed the Weser and reached the Elbe. It was the farthest point in Germania that a Roman army had ever reached. In order to consolidate the gains, he took many measures: he built fortresses along the Elbe, Weser and the Meuse, he organized a permanent flotilla on the Rhine. Apparently, he was dissuaded from crossing the Elbe by a vision in which the supernatural-sized apparition of a woman foretold him his impending death.