A second False Dmitri, claiming to be the son of Ivan IV, defeats
Tsar Shuisky and advances towards Moscow. The Tsar pleads for aid
from Sweden, promising in return to cede the territory of Karelia.
Citation:
Editors. "The Second False Dmitri defeats Tsar Shuisky".
The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=15661, accessed 23 May 2013.]