There had been a long bloody war in the empire of Germany for twelve
years, between the emperor, the Duke of Bavaria, the King of
Spain, and the Popish princes and electors on the one side, and the
Protestant princes on the other; and both sides having been exhausted
by the war, and even the Catholics themselves beginning to dislike the
growing power of the house of Austria, 'twas thought all parties were
willing to make peace. Nay, things were brought to that pass that some
of the Popish princes and electors began to talk of making alliances
with the King of Sweden.

Here it is necessary to observe, that the two Dukes of Mecklenburg
having been dispossessed of most of their dominions by the tyranny
of the Emperor Ferdinand, and being in danger of losing the rest,
earnestly solicited the King of Sweden to come to their assistance;
and that prince, as he was related to the house of Mecklenburg, and
especially as he was willing to lay hold of any opportunity to break
with the emperor, against whom he had laid up an implacable prejudice,
was very ready and forward to come to their assistance.

The reasons of his quarrel with the emperor were grounded upon the
Imperialists concerning themselves in the war of Poland, where the
emperor had sent 8000 foot and 2000 horse to join the Polish army
against the king, and had thereby given some check to his arms in that
war.

In pursuance, therefore, of his resolution to quarrel with the
emperor, but more particularly at the instances of the princes
above-named, his Swedish Majesty had landed the year before at
Stralsund with about 12,000 men, and having joined with some forces
which he had left in Polish Prussia, all which did not make 30,000