The ancient Vikings were of the Nordic religion, a folk religion with Thor as the head Guy and a bunch of other gods.
The religion of the Celtic-speaking Gaels of Ireland was Pagan Druidism which was later replaced by Catholicism.
The most notable invaders of Ireland in the 12th century were the Normans.
Approximately from 800 AD onward the Vikings invaded from Denmark and Norway inhabiting the eastern parts of Ireland.
They never occupied Ireland although there is a suggestion they were looking at the possibilty of doing so. There are Roman artefacts found around Dublin and the Town of Chester (then Deva) was one of the biggest forts in the whole empire. The only reason for this would be the conquest of Ireland. The Empire fell into civil war and then collapsed before they made a move on Ireland.
the Normans invaded the British in 1006
Vikings
The most notable invaders of Ireland in the 12th century were the Normans.
Norway as a sovereign country has never invaded Ireland. But the Vikings of Scandinavia invaded England, Scotland and Ireland for hundreds of years.
The original religion for Ireland was catholic but when the British invaded some were converted to the protestant religion. But even now the catholic religion is still the most major in the country.
Ireland is an island, so the sea acted as some protection, but Ireland nevertheless has been invaded by other cultures, such as the Vikings, who have added to Irish culture.
Approximately from 800 AD onward the Vikings invaded from Denmark and Norway inhabiting the eastern parts of Ireland.
The huns
Muslim, Magyar, and Vikings invaded Europe in the 800s.
Personally, I have never been invaded by Vikings. They did cause a bit of trouble for my Irish relations, though.
The Vikings were great boat builders. They got to Ireland by boat.
They never occupied Ireland although there is a suggestion they were looking at the possibilty of doing so. There are Roman artefacts found around Dublin and the Town of Chester (then Deva) was one of the biggest forts in the whole empire. The only reason for this would be the conquest of Ireland. The Empire fell into civil war and then collapsed before they made a move on Ireland.
1066
Vikings attacked Ireland, however, they never reached Greece.