The spring of 51 BCE saw the legions campaign among the Belgic tribes to snuff out any thoughts of an uprising, and the Romans achieved peace. But two chiefs in southwest Gaul, Drappes and Lucterius, remained openly hostile to the Romans and had fortified the formidable Cadurci oppidum of Uxellodunum. Gaius Caninius Rebilus surrounded the oppidum and set the siege of Uxellodunum, focusing on building a series of camps, a circumvallation, and disrupting Gallic access to water. A series of tunnels (of which archeological evidence has been found) were dug to the spring that fed the city. The Gauls attempted to burn down the Roman siege works, but to no avail. Eventually, the Roman tunnels reached the spring and diverted the water supply. Not realizing the Roman action, the Gauls believed the spring going dry was a sign from the Gods and surrendered. Caesar chose not to slaughter the defenders, and instead just cut off their hands as an example.