Task: Text Categorization
Input (English): Consolidation of its eastern lands was aided by the complacency of the rlssi class and by the archbishop Maunu Tavast. The inability of its miners to trade iron during wartime led to the Engelbrekt Rebellion, after which Christopher of Bavaria unseated its first ruler. Instituted for Albert of Mecklenburg's failure to pay 60,000 silver marks, its strongest king was Eric of Pomerania, but it ended after a series of executions in Stortorget Square, known as the Stockholm Bloodbath, led to greater national feelings. FTP, name this entity created by a 1397 declaration in which Margaret I united Norway, Sweden, and Denmark.
Output (English): History