title: History of Ireland (800–1169)
context: The first recorded Viking raid in Irish history occurred in AD 795 when Vikings, possibly from Norway[10] looted the island of Lambay.[note 4] This was followed by a raid on the coast of Brega in 798, and raids on the coast of Connacht in 807.[11] These early Viking raids were generally small in scale and quick.
question: When did the Vikings arrive in Ireland?
answers: 795