Colonel Ludwig Pfyffer forms the Borromean League of the Seven
Swiss Catholic Cantons, which is also known as the Golden League.
This almost leads to a split in the Swiss Confederation on
religious lines, especially when the League makes an alliance with
Philip II of Spain the following year.
Citation:
Editors. "Borromean League of Seven Swiss Catholic Cantons is formed".
The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=15328, accessed 22 May 2013.]