Varus initially commanded five legions plus auxiliaries in Germania. In the early imperial period each legion at full strength had 4,800 men supported by 120 light escort/scouting cavalry. Combined usually with a group of engineers and officers, a legion was roughly 5,000 fighting men. This did not include the 1,200 non-combatant servants that were integrated into the legion. Varus's initial command of about 25,000 (not counting auxiliaries) represented some 20% of the Roman frontline army. But it is unclear how many men were truly under his command at the battle of the Teutoburg Forest; estimates generally range from 20,000 to 30,000. Of his five starting legions, only three were under his command at the battle (~15,000 men), supported by nine small auxiliary units (~4,500 men). Winter attrition due to casualties, illness, and other causes would have sapped the legions' strength. The Roman historian Cassius Dio assumed that a large number of civilians were part of the camp following. But historian McNally finds this unlikely. Recent reforms had required that legionaries be unmarried, which meant that families were no longer part of the camp following. McNally puts the likely number of civilians at a few hundred, mostly merchants who followed the army. McNally, assuming 10% winter attrition, and an auxiliary force of about 4,000 after attrition, comes up 17,000 combatants, supported by roughly 3,800 servant non-combatants. Combined with the civilians, the army would have numbered about 21,000 at the start of campaigning, but was probably smaller by the time of the battle, as further attrition combined with the need to detach garrisons along the way would have sapped the army's strength.
Varus initially commanded five legions plus auxiliaries in Germania. In the early imperial period each legion at full strength had 4,800 men supported by 120 light escort/scouting cavalry. Combined usually with a group of engineers and officers, a legion was roughly 5,000 fighting men This did not include the 1,200 non-combatant servants that were integrated into the legion. Varus's initial command of about 25,000 (not counting auxiliaries) represented some 20% of the Roman f.rontline army. But it is unclear how many men were truly under his command at the battle of the Teutoburg Forest; estimates generally range from 20,000 to 30,000. Of his five starting legions, only three were under his command at the battle (~15,000 men), supported by nine small auxiliary units (~4,500 men). Winter attrition due to casualties, illness, and other causes would have sapped the legions' strength. The Roman historian Cassius Dio assumed that a large number of civilians were part of the camp following. But historian McNally finds this unlikely. Recent reforms had required that legionaries be unmarried, which meant that families were no longer part of the camp following. McNally puts the likely number of civilians at a few hundred, mostly merchants who followed the army. McNally, assuming 10% winter attrition, and an auxiliary force of about 4,000 after attrition, comes up 17,000 combatants, supported by roughly 3,800 servant non-combatants. Combined with the civilians, the army would have numbered about 21,000 at the start of campaigning, but was probably smaller by the time of the battle, as further attrition combined with the need to detach garrisons along the way would have sapped the army's strength.