Editors. "Great Elector concludes alliance with Dutch". The Literary Encyclopedia. First published 01 April 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=16573, accessed 18 April 2014.]
Frederick William, the Great Elector of Brandenburg, forms an alliance with the Dutch, promising an army of 22,000 which leads to the First Coalition against France.