The first half of the 1440's sees two revolts in Brandenburg. The first is due to the burghers of Berlin-Cölln who don't want to give up city rights and priviliges without a battle. This event earns us a free Level 2 fortress in Brandenburg and some slider changes (the +2 centralization is especially good).
Unrest in Berlin-Cölln, December 1441.
The second uproar is caused because we hang a treacherous noble and confiscate his lands instead of merely cutting his head of. You can't be too strict with these nobles.
Treacherous noble arrested, April 1443.
Later that summer we learn that the Danish expand their influence some more in the northern HRE by vassalizing Stettin. Previously they had vassalized and annexed Mecklenburg. Meanwhile the Fortress in Magdeburg gets upgraded to Level 2.
Stettin became vassals of Denmark, June 1443.
Diplomatically nothing really changes over the years. We renew our royal marriag with Poland and arrange new royal marriages with our alliance members Guelders, Friesland and Berg. I raise relations with Berg to the maximum and ask them if they would be my vassals three times and they refuse three times.
People in Berlin-Cölln have, by May 1446, become a bit restless and want to go lynch some Jews but I disagree with such a move. After all they are quite a provider of income.
Pogrom in Berlin-Cölln avoided, May 1446.
In June 1447 the Pope agrees to give the Elector the right to nominate bishops in his lands, the so called Concordat of 1447.
Concordat of 1447, June 1447.
The people of Berlin-Cölln have now become quite used to the presence of the Electoral authority in their city and Friedrich II decided the time is right to move the capital to the city.
The capital switch to Berlin-Cölln, January 1451.
Sometime before the switch we can move a slider again and I chose to move 1 step towards Quality. We are after all on our way to hopefully become Prussia so we better prepare!
Slider move to Quality, April 1450.
The next few years go by quite uneventfully. We gain a level in Land and Naval Technology. We now have level 3 in Land and level 2 in naval. We enlarge our army a bit to be equal with Berg's army (which we were trying to vassalize, but failed) and hang another treacherous noble in Hannover.
Things become interesting again in 1455 when Berg releases Cleves as a vassal. A year later Guelders attacks Cleves and we answer Guelders call to arms.
Cleves released as vassal and subsequently attacked.
This opens the door for Burgundy to join the fun and they declare war on Guelders. Burgundy's ally France joins as well. Against better judgement I decide to honour the call to arms.
Burgundy declares war on Guelders, October 1456.