The Caspian expeditions of the Rus' were military raids undertaken by the Rus' between 864 and 1041 on the Caspian Sea shores, of what are nowadays Iran, Dagestan, and Azerbaijan. 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 in the Gorgan region, in the territory of present-day Iran, and more to the west, in Gilan and Mazandaran, taking slaves and goods. On their return, the northern raiders were attacked and defeated by the Khazars in the Volga Delta, and those who escaped were killed by the local tribes on the middle Volga.
During their next expedition in 943, the Rus' captured Bardha'a, the capital of Arran, in the modern-day Republic of Azerbaijan. The Rus' stayed there for several months, killing many inhabitants of the city and amassing substantial plunder. It was only an outbreak of dysentery among the Rus' that forced them to depart with their spoils. Sviatoslav, prince of Kiev, commanded the next attack, which destroyed the Khazar state in 965. Sviatoslav's campaign established the Rus's hold on the north-south trade routes, helping to alter the demographics of the region. Raids continued through the time period with the last Scandinavian attempt to reestablish the route to the Caspian Sea taking place in 1041 by Ingvar the Far-Travelled.
The Rus' first penetrated to the Muslim areas adjacent to the Caspian Sea as traders rather than warriors. By the early 9th century, the Norsemen settled in northwestern Russia, where they established a settlement called Aldeigja (Slavic: Ladoga) about 6 miles (9.7 km) south of the Volkhov River entry into Lake Ladoga. From there, they began trading with the Byzantine Empire along the Dnieper trade route and with the Muslim lands around the Caspian Sea along the Volga trade route. In the late 9th century, ibn Khordadbeh described the Rus' buying goods from the Khazars in the market areas on the lower Volga and selling them on the markets of Caspian towns; these merchants brought furs, honey, and slaves. Small groups of the Rus' even went on camels as far as Baghdad to sell their goods; their European slaves interpreted for them.