place
Isara (river Isère)
the Isara
A left-bank tributary of the Rhone in Transalpine Gaul (modern Isère). Plancus bridged it in a single day in 43 BC and later broke the bridges to cover his retreat from Lepidus and Antony.
Reading notes
- Ad Familiares 10.15 §3 the Isère, the largest river in the territory of the Allobroges
The Isère (Latin Isara), an Alpine tributary of the Rhone running through the lands of the Allobroges in Transalpine Gaul; Plancus bridged it in a single day to march south toward Lepidus.
- Ad Familiares 10.18 §4 the bridge, however, which I had built across the Is\`ere I have left in place, with two forts set at its heads
Plancus kept his pontoon bridge over the Isère (Latin Isara) garrisoned with twin bridgehead forts (castella ad capita) so that Decimus Brutus's army could cross without delay; standard Roman practice for securing a river passage.
- Ad Familiares 10.21 §2 I had thrown a bridge across the river Isara in a single day
The Isara is the river Isère, a left-bank tributary of the Rhone in Transalpine Gaul; bridging it in a day to bring his army toward Lepidus was a feat Plancus advertises as proof of his energy.