Editors. "John VI of Portugal re-asserts his authority". The Literary Encyclopedia. First published 30 December 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=17851, accessed 31 July 2014.]
The Garrison of Lisbon has risen in revolt against John VI of Portugal, and recognised his younger son, Dom Miguel, as their ruler. King John first sanctions his son's actions, but then boards a British warship, repudiates this decree and re-asserts his authority.
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