The Tagus Campaign of 1809: An Alliance in Jeopardy

This is the story of the first Anglo–Spanish campaign against the French during the Peninsular War, a previous attempt to launch joint operations during Sir John Moore's ill–fated expedition to Iberia having failed before the allies had an opportunity to unite.

Hardly had the ramifications of Britain’s setback in her first Iberian expedition settled, before a second was launched, Sir Arthur Wellesley disembarking at Lisbon on 21 April 1809. Wellington’s primary objective was the liberation o...