Gaul

Gaul was a region in Europe that existed around the time of the Roman Empire. It comprised of 21st century France, Belgium, Luxembourg, part of Switzerland, Northern Italy and bits of Germany and the Netherlands. (PROSE: Combat Magicks)

History
In the 1st century, the Roman Empire was involved in a war in Gaul. As a show of strength, they had mercilessly strung up hundreds of people there. (PROSE: Byzantium!) In 64 AD, Flavius Giscard took part in the fighting while the First Doctor, Ian Chesterton, Barbara Wright and Vicki stayed at his villa. (TV: "The Slave Traders")

In 451 AD, Attila the Hun led an army against Rome. The Thirteenth Doctor and Team TARDIS met one of his commanders, Bleda, between Orléans and Chalons. (PROSE: Combat Magicks)

Alternate timelines
In an alternate timeline where all of history occurred at once after River Song refused to kill the Eleventh Doctor, Holy Roman Emperor Winston Churchill went to Gaul to speak with Cleopatra. (TV: The Wedding of River Song)