George Canning's agreement to send troops to Portugal, to counteract Spanish threat of invasion in support of Dom Miguel, who is trying to obtain throne from Maria.
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Citation: Editors, Litencyc. "Britain supports Portugal against Spain by sending troops to Tagus". The Literary Encyclopedia. First published 01 January 2010 [https://www.litencyc.com/php/stopics.php?rec=true&UID=4632, accessed 09 June 2026.]
