The Roman Siege that failed

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The Roman siege of Ambrosia was an example of a Roman siege that failed.

The Roman siege of Ambracia was a major operation in 189 B.C., during Rome’s war against the Aetolian League, and it became one of antiquity’s best examples of underground siege warfare.

Rome, led by Marcus Fulvius Nobilior, besieged the fortified Greek city of Ambracia, capital of the Aetolian League. The city’s walls were strong, so instead of relying on direct assault, the Romans turned to mining tunnels to collapse the fortifications. The Greek defenders detected the tunnels and dug counter‑mines, leading to brutal, close‑quarters fighting in total darkness. 

Romans dug tunnels to undermine the walls; Greeks counter‑tunneled to intercept them. 

Defenders used bronze vessels pressed to the ground to hear Roman digging—an early form of seismic detection.

: Greeks deployed a jar filled with burning chicken feathers to create choking smoke in the tunnels—one of the earliest recorded uses of chemical weapons.

Fighting occurred in cramped, pitch‑black tunnels where normal weapons were nearly useless. 

Despite intense fighting above and below ground, Ambracia did not fall by force. Instead, the city negotiated a surrender on moderate terms, ending the siege. This effectively broke the Aetolian League’s resistance and cemented Roman dominance in Greece.  

Here is a video on this unusual Roman stalemate.

 

 

 

https://www.historicnotorious.com/the-siege-of-ambracia