 The exiled Christian II was contacted by Olav Engelbrektsson, Catholic Archbishop of Norway and head of the Council of the Realm, in 1529.Christian II was a Protestant, but was also the brother-in-law of Emperor Charles V and therefore vowed to help the Catholic cause in Norway.After Frederick's marriage to Dorothea, Frederick soon sent a letter to Olav Engelbrektsson (via emissaries in Brussels) where he promised military support from himself and Charles V. In the winter of 1536, Olav Engelbrektsson sent squads of supporters to villages in Eastern Norway; among other things the squads read the letter out to people, signalling that a new ruler could be on his way.