Marshal Masséna’s invasion of Portugal of September 1810-March 1811 was intended to be the final campaign of the French invasion of Iberia, ending the Peninsular War, but instead the French ran up against the Lines of Torres Vedras, and the campaign ended in a disastrous retreat.
The battle of Bussaco of 27 September 1810 was the one major battle during Marshal Masséna’s invasion of Portugal of 1810, and was a costly French defeat suffered in an attempt to attack a very strong Allied position on the ridge at Bussaco.
The first combat of Sobral of 12 October 1810 was the first of two skirmishes around the village of Sobral that would turn out to be the only French attacks on the Lines of Torres Vedras, the strong defensive position built to protect Lisbon.
The second combat of Sobral of 14 October 1810 was a skirmish south of the village of Sobral that would turn out to be the most serious attack the French would launch against the Lines of Torres Vedras.
The combat of Guarda of 29 March 1811 was a bloodless British victory in the last stages of Masséna’s retreat from Portugal.
The combat of Sabugal of 3 April 1811 was the last serious fighting during Masséna’s retreat from Portugal in 1811, and was a missed chance for a major Allied victory over an isolated portion of Masséna’s army.