Archduke Leopold of Austria lays siege to the fortress of Jülich on
behalf of Holy Roman Emperor Rudolf II, who is attempting to claim
the Duchy for his own.
Citation:
Editors. "Imperial force besieges the fortress of Jülich".
The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=15668, accessed 24 May 2013.]