I hope I posted this in the correct area. I was curious about the aftermath of the Battle of Tuetoberg Forest. After the battle, Rome never reconstituted those three legions lost, nor did they stand up new legions, causing the size of the Roman Army to drop for many years. My question is, why did Rome do this? Did they lack money or manpower, was Rome preoccupied at the time? I'm curious about this because Rome was a state whose existence seemed to rely on military expansion, so why after a defeat, would Rome give up? Rome survived Hannibal, so why did they halt before Arminus? If anyone has some insight I'd appreciate it, I've been searching around and all I can find is what happended, not the reason behind retreating behind Rhine River.