For millennia, the Arkansas River has been essential to Oklahomans. The earliest evidence of extensive river trade has been found at Spiro archaeological sites, where commodities indicate trade as far as Wisconsin and Florida. As a result, present day Tulsa seated along the Arkansas River became one of the most populous villages, experiencing a golden age from 900 – 1200 CE. In more recent history, the Louisiana French traded along the Arkansas and its tributaries, representing the value of the Oklahoma territory.