generate questions: The earliest mentions of Slavic raids across the lower River Danube may be dated to the first half of the 6th century, yet no archaeological evidence of a Slavic settlement in the Balkans could be securely dated before c. 600 AD.
The earliest mentions of Slavic raids are across what river? {sep_token} The earliest mentions of what may be dated to the first half of the 6th century? {sep_token} No archaeological evidence of a Slavic settlement in the Balkans could be securely dated before when? {sep_token} There is no evidence of a Slavic settlement where before c. 600 AD? {sep_token}