Germanicus in Germany

Roman general to retrieve defeat of Teutoburg Forest.  Germans defiant; Romans unsteady.  Year is 13 AD.  Roman Empire is still brand new.  Is Rome doomed?  Tacitus says,

Germanicus therefore handed over to Caecina four legions, five thousand auxiliaries, and some tumultuous bands of Germans who dwelt on this side the Rhine; he led, himself, as many legions, with double the number of allies, and erecting a fort in Mount Taunus, upon the site of one raised by his father, he pushed on in light marching order against the Cattians; having left Lucius Apronius to secure the roads and the rivers, for, as the roads were dry and the rivers within bounds — events in that climate of rare occurrence — he had found no check in his rapid march, but on his return apprehended the violent rains and floods. http://dld.bz/f8r4r