Mezue ahịrịokwu na-esonụ: N'ịgbaso nkwekọrịta nke Fontainebleau nke France na Spain bịanyere aka na ya n'ọnwa Ọktoba nke 1807, nke kwenyere na mwakpo nke Portugal, ndị agha France n'okpuru iwu nke General Junot banyere mba ahụ, nke rịọrọ enyemaka site n'aka ndị Britain. N'ọnwa Julaị nke afọ 1808, ndị agha Arthur Wellesley, 1st Duke nke Wellington du ndị agha France meriri na Portugal n'agha nke
Roliça na Vimeiro. Nke a manyere Junot ịkpa nkata maka Nkwekọrịta nke Cintra, nke dugara na mwepụ nke ndị agha France na Portugal. Na Machị 1809, Marshal Soult duziri ndị njem French ọhụrụ nke gara na ndịda ruo obodo Porto tupu ndị agha Portuguese-British gbochie ha ma mee ka ha laa. Otú ọ dị, iyi egwu nke mwakpo ndị ọzọ nke ndị France dugara Wellington, n'October 20, 1809, inye iwu ka e wuo usoro nchebe n'ebe ugwu nke isi obodo ahụ, n'agbata Oké Osimiri Atlantic na Osimiri Tagus. E wuru Lines nke Torres Vedras, nke nwere 152 ebe e wusiri ike, redoubts na ụlọ ọrụ ndị agha ndị ọzọ, ngwa ngwa na ọnọdụ nke nzuzo dị ukwuu, n'okpuru nlekọta nke Ọchịagha Richard Fletcher bụ onye isi ndị Royal Engineers.