Iron Age and the Roman period (roughly 5th century BC to 5th century AD). Their homeland was known as Gaul (Gallia). They spoke Gaulish, a continental Celtic language.- Detroit (Wikipedia)
Detroit (/dɪˈtrɔɪt/ dih-TROYT, locally also /ˈdiːtrɔɪt/) is the most populous city in the U.S. state of Michigan. It is the most populous U.S. city on the United States–Canada border, and the seat of government of Wayne County. Detroit had a population of 639,111 at the 2020 census, making it the 27th-most populous city in the United States. The metropolitan area, known as Metro Detroit, is home to 4.3 million people, making it the second-largest in the Midwest after the Chicago metropolitan area, and the 14th-largest metropolitan area in the nation. Regarded as a cultural center, Detroit is known for its contributions to music, art, architecture and design, in addition to its historical automotive background. Time named Detroit as one of the fifty World’s Greatest Places of 2022 to explore.