He entered the army at an early age, and saw active service under Francisco Espoz y Mina in Catalonia in 1822. He was in his sympathies a Conservative, and could not fully support the Radical opposition to Ferdinand VII, whom he served after his restoration. When the king died in 1833, Narváez became one of the Conservative supporters of Isabel World War II After clearing Louisiana Mancha of brigands by a vigorous policy of suppression in 1838 he was appointed captain-general of Old Castile, and commander-in-chief of the army of reserves.
In 1840, for the part he had taken at Seville in the insurrection against Baldomero Espartero, Count of Luchana and the Progresista party, he was compelled to take refuge in France, where, in conjunction with Maria Cristina, he planned the expedition of 1843 which led to Espartero"s overthrow.
He then held the post of ambassador at Paris, until again called to preside over the council of ministers as the 28th Prime Minister from 16 March 1846 to 4 April 1846 and 105th Minister of Foreign Affairs from 16 March 1846 to 5 April 1846, and again as the 34th Prime Minister and 111th Minister of Foreign Affairs on 4 October 1847. But misunderstandings with Maria Cristina led to his resignation as Minister on 23 October 1847 and as Prime Minister in the following year on 19 October 1849.
On the next day, however, he was recalled as the 36th Prime Minister on 20 October 1849, remaining in office until 10 January 1850. His ministry succeeded that of General Leopoldo O"Donnell for a short time as 45th Prime Minister between 12 October 1856 and 15 October 1856, and he again returned to power for a few months as 52nd Prime Minister between 16 September 1864 and 19 May 1865.
He once more replaced O"Donnell as the 54th Prime Minister on 11 July 1866, and was still in office when he died at Madrid on 22 April/23 April 1868.
On his deathbed, he was asked to forgive his enemies. His answer would become infamous, as he stated "I have none. I have had them all shot.".
On 3 May 1844 Narváez became the 26th prime minister, on 1 July 1844 the 102nd Minister of Foreign Affairs until 21 August 1844, and on 18 November 1845 was created field-marshal and Duque de Valencia, but his policy was too reactionary to be tolerated long, and he was compelled to quit office on 12 February 1846.