91st Argyll Highlanders and the Peninsular War
- This regiment's part in Corunna, Walcheren and the British campaign across the Pyrenees.
- http://www.aboutscotland.com/argylls/91penin.html

Guerra de la Independencia española 1808-1814
- Spanish text only, but some useful maps and illustrations.
- http://www.1808-1814.org/

The Peninsular War 1808-1814
- A well presented history of the war with extra information on many of the battles, including photographs of the battlefields and guidance for modern-day visitors.
- http://www.peninsularwar.org/

Freer Letters from the Peninsular War
- Annotated collection of letters between members of the Freer family, three of whom served, and were killed, in the Peninsular.
- http://home.cc.umanitoba.ca/~sfreer/freerwar.html

Wellington's Crossing of the Douro, 1809
- An account by Charles O'Malley, a dispatch rider in Wellington's army.
- http://www.fordham.edu/halsall/mod/1809wellington.html

A Quick Primer on the Peninsular War
- Accessible account aimed at readers (and writers) of historical fiction. Features first-hand accounts of Cuidad Rodrigo, Badajoz, Salamanca and Vittoria.
- http://homepages.ihug.co.nz/~awoodley/regency/peninsula.html