I want to know the answer to the following question:
What year did the Rus raid Baku, Gilan,Mazandaran, and Caucasus?
All the background I'm provided with is that "The Rus' were raiding and plundering into the Caspian Sea region from 864, with the first large-scale expedition in 913, when they extensively raided Baku, Gilan, Mazandaran and penetrated into the Caucasus.". Is that enough to answer the question?