Siege of Cadiz and battle of Barrosa

The siege of Cadiz of 5 February 1810-24 August 1812 was the longest and arguably most important of the many sieges that punctuated the Peninsular War.
The campaign that led to the battle of Barrosa demonstrated the weakness of the French position in Andalusia during the two and a half years that they occupied the province.
The battle of Barrosa of 5 March 1811 was the end result of one of the most significant attempts made by the garrison of Cadiz to lift the French siege of Cadiz