North Germanic peoples
Vikings were also active in Francia. Some of these Vikings would sail through the Strait of Gibraltar and pillage the coasts of the Mediterranean Sea. In the early 10th century, a group of Vikings under the leadership of Rollo settled in Rouen, France, and established the Duchy of Normandy. The descendants of these Vikings, known as the "Normans", would in the 11th century conquer England, Southern Italy, and North Africa, and play a leading role in launching the Crusades. Sub-groups of the Normans include Anglo-Normans, Scoto-Normans, Cambro-Normans, Hiberno-Normans and Italo-Normans.
Viking Age in Estonia
The Viking Age in Estonia was a period in the history of Estonia, part of the Viking Age (793–1066 AD). It was not a unified country at the time, and the area of Ancient Estonia was divided among loosely allied regions. It was preceded by the Bronze and Early Iron Ages in Estonia, during which an agrarian society had developed, the Migration Period (450–550 AD), and Pre-Viking Age (550–800 AD) with the Viking Age itself lasting between 800–1050 AD. It is often considered to be part of the Iron Age period which started around 400 AD and ended around 1200 AD, soon after Estonian Vikings were recorded in the "Eric Chronicles" to have sacked Sigtuna in 1187.