Final answer:
The Viking invasions of Ireland lasted for several decades, from the late 8th century to the late 11th century. As the Vikings settled in the lands they had raided and states emerged in Scandinavia, the Viking raids ceased and they became more like other medieval Europeans.
Step-by-step explanation:
The Viking invasions of Ireland lasted for several decades, from the late 8th century to the late 11th century. The Vikings established settlements throughout the British Isles, including Ireland, as well as in other regions such as Iceland, Greenland, and even briefly in North America. However, as powerful states emerged in Scandinavia and the Vikings converted to Christianity, the raiding period came to an end and the Vikings came to resemble other medieval Europeans.