Haltern
Haltern am See, Germany
Aliso was a military and civilian colony in ancient Germany, built by the emperor Augustus near present-day Haltern am See, when he wanted to create the Roman province of Germania. After the Battle of the Teutoburg Forest in 9 AD, Aliso was the last point of resistance of the Roman troops in Germania. Besieged by the Germans under Arminius, the garrison commanded by the prefect Lucius Caedicius put up a fierce resistance before managing to escape and regain the Roman limes.
Monument data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).