Denmark:
c. 12500 BC Immigration of the hunters began.
3900 BC Agriculture and animal husbandry was introduced.
400-700 Incipient urbanisation
866-867 Viking conquest of York
c.965 Introduction of Christianty
1015-1034 England under Danish rule
References:
https://www.bbc.com/news/world-europe-17930409
http://denmark.dk/en/society/history
Sweden:
8,000 BC The first human movement in Sweden
4,000 BC People in Sweden were introduced to farming and agriculture.
2,000 BC Bronze is introduced into Sweden
500 BC Iron is introduced into Sweden
9th Century AD Sweden becomes a single kingdom. Swedes cross the Baltic and sail along rivers into Russia.
References:
http://www.localhistories.org/swedentime.html
https://www.bbc.com/news/world-europe-17961621
Norway:
7,000 BC The first human beings arrive in Norway
3,000 BC Farming begins in Norway
1,500 BC Bronze is first used in Norway
500 BC Iron is first used in Norway
200 AD A form of writing called runes is used in Norway
9th Century AD Vikings from Norway raid other parts of Europe
References :
http://www.localhistories.org/norwaytime.html
https://www.bbc.com/news/world-europe-17746861
Suhani Dagur
Section A