Napoleon proclaimed the Decree of Berlin which established the Continental System that 'blockaded' Britain from those parts of Europe under French control.
Editors. "Britain blockaded by Napoleon". The Literary Encyclopedia. First published 01 February 2010; last revised 30 November -1.
[http://www.litencyc.com/php/stopics.php?rec=true&UID=4396, accessed 21 April 2015.]