1537 is the year when Norway became a puppet state under the Danish Crown. Christian III did a coup d'état in Norway and made it a hereditary kingdom in a real union with Denmark that would last until 1814 when Frederick VI ceded the Kingdom of Norway to Charles XIII of Sweden. King Christian III also made by force Lutheranismstate religion in Norway, and it was the state religion until 2012.[1] 1537 is known as one of the darkest years in Norwegian history. Its also the start year for the early modern period in Norway (1537-1814), and the period known as The Puppet State era (lydriketiden) (1537-1660).
May – The forces sent by Christian III arrives in Norway. The army splits in two. One part plunders setesveins of Olav Engelbrektsson, the other part heads to Hamar to arrest Bishop Mogens Lauritssøn.