853 Vikings Tour de France

Noerre Naeraa runestone 850-875 found at Naeraa church
Inscription "Thormund enjoy the hill"
France
May: Hastein destroyed Lucon.
July: Viking raiders in France sailed from Nantes to the Tours area. A raid was made on The monastery at Saint-Florent-le-Vieil
8 November:The monastery Marmoutier were plundered.
People began to immigrate from France, because of the instability and devastation and French rural residents destroyed roads and destroyed bridges to prevent Vikings entering their area.
Ireland
Olaf the White (Amlaibh) proclaimed himself king of all Norwegians in Ireland . The Irish king Mael Seachlinn tried effortless to unite the Irish.
Younger rune alphabet introduced ca 800 AD