In the 9th–11th century AD, there were repeated military raids undertaken by the Rus' between 864 and 1041 on the Caspian Sea shores of Iran, Azerbaijan, and Dagestan as part of the Caspian expeditions of the Rus'. Initially, the Rus' appeared in Serkland in the 9th century traveling as merchants along the Volga trade route, selling furs, honey, and slaves. The first small-scale raids took place in the late 9th and early 10th century. The Rus' undertook the first large-scale expedition in 913; having arrived on 500 ships, they pillaged the westernmost parts of Gorgan as well as Gilan and Mazandaran, taking slaves and goods.