against the Swedish Empire during the ongoing Second Northern War. Frederick William I had in Wehlau agreed to aid John II Casimir Vasa with 8,000 men, and both parties agreed on an "eternal alliance". In Bromberg, it was agreed that from his Prussian province, Frederick William I would dispatch 1,500 foot and 500 horse to join the army of the Polish king. Financial and territorial agreements In return, the Polish crown granted Brandenburg-Prussia Lauenburg and Bütow Land as a hereditary fief. It was to be held at the same conditions as previously granted to the House of Pomerania, free of duties except that the House of Hohenzollern had sent envoys to the coronations of successive Polish kings, who were then to receive a written confirmation of the fief. If the Hohenzollern dynasty had no male heir, the fief should return to the Polish crown. In addition to Lauenburg and Bütow land, Brandenburg-Prussia was to receive the town of Elbing (Elbląg). In an amendment, Brandenburg-Prussia was obliged to return the town to Poland once the latter had bailed it out with 400,000 thalers. The third Polish concession was the payment of 120,000 thalers to Brandenburg-Prussia for war-related damage suffered upon entering the war by Poland. As a security for this payment, the district of Draheim was to be handed over to Brandenburg for three years. The district comprised the town of Tempelburg (now Czaplinek) and 18 villages at the border of Brandenburgian Pomerania. The sum was to be paid in annual rates of 40,000 thalers, and Brandenburg was to keep Draheim if the money had not been paid by the end of the third year. For the Catholics in Draheim, religious freedom was guaranteed. The Hohenzollern also agreed to grant religious freedom to the Catholic Church in Lauenburg and Bütow Land. The Catholic communities were to stay subordinate to and to be represented by the Kuyavian bishop and keep all of their income, and the Electors of Brandenburg and the local nobility were to have patronage over the churches. The rights of the nobility of Lauenburg and Bütow Land were to be left unchanged, and previous court sentences and privileges were to remain in force. The administration of the region should be conducted just as it had been handled by the Pomeranian dukes. In a note issued separately from the treaty, John II Casimir assured the nobles that Poland would continue