Norway was unified into a single kingdom through the merger of petty kingdoms.
Norway entered a union with Denmark that lasted until 1814.
Norway was ceded to Sweden after the defeat of Denmark in the Napoleonic Wars.
Norway gained full independence after a peaceful dissolution of the personal union with Sweden.
Nazi Germany invaded and occupied Norway during World War II.
Norway was liberated from German occupation at the end of World War II.
Norway established its constitution, marking the beginning of its constitutional monarchy.