The Ordovīcēs were one of the Celtic tribes living in Great Britain before the Roman invasion. Their tribal lands were located in present-day North Wales and England, between the Silures to the south and the Deceangli to the north-east. Unlike the latter tribes that appear to have acquiesced to Roman rule with little resistance, the Ordovices fiercely resisted the Romans. They were eventually subjugated by the Roman governor Gnaeus Julius Agricola in the campaign of 77–78CE when the Romans overran their final strongholds on Anglesey.

Wales is a country that is part of the United Kingdom. It is bordered by the Irish Sea to the north and west, England to the east, the Bristol Channel to the south, and the Celtic Sea to the south-west. As of the 2021 census, it had a population of 3,107,494. It has a total area of 21,218 square kilometres (8,192 sq mi) and over 2,700 kilometres (1,680 mi) of coastline. It is largely mountainous with its higher peaks in the north and central areas, including Snowdon, its highest summit. The country lies within the north temperate zone and has a changeable, maritime climate. The capital and largest city is Cardiff.