Tassilo II was a Duke of Bavaria who ruled during the late 8th century, specifically from around 748 to 788 AD. He belonged to the Agilolfing dynasty and was known for his strong ties to the Frankish Empire, particularly to Charlemagne, who was a key figure in European history. Tassilo's reign was marked by efforts to maintain the independence of Bavaria while navigating the growing influence of the Franks. In 788, Tassilo II faced challenges from Charlemagne, leading to his eventual downfall. He was accused of treason and subsequently deposed, which resulted in Bavaria being fully integrated into the Frankish Empire. This event marked a significant shift in the political landscape of the region.