| Alessandro Asinari di San Marzano | |
| Monarch1: | Umberto I |
| Office1: | Minister of War[1] [2] |
| Predecessor1: | Luigi Pelloux |
| Primeminister1: | Francesco Crispi |
| Successor1: | Giuseppe Mirri |
| Term Start1: | December 14, 1897 |
| Term End1: | May 14, 1899 |
| Monarch2: | Umberto I |
| Office2: | Minister of the Navy |
| Predecessor2: | Benedetto Brin |
| Primeminister2: | Francesco Crispi |
| Successor2: | Felice Napoleone Canevaro |
| Term Start2: | May 24, 1898 |
| Term End2: | June 1, 1898 |
| Office3: | Senator of the Kingdom of Italy |
| Birth Date: | 20 March 1830 |
| Birth Place: | Turin, Sardinia-Piedmont |
| Death Place: | Rome, Lazio, Italy |
| Death Cause: | Illness |
| Relations: | Guido Cipriano Asinari Carolina Asinari of Bernezzo |
| Allegiance: | Sardinia-Piedmont |
| Branch: | Royal Sardinian Army Royal Italian Army |
| Serviceyears: | 1848 — 1888 |
| Rank: | Major General |
| Battles: | First Italian War of Independence Crimean War Second Italian War of Independence
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Alessandro Asinari di San Marzano (1830–1906) was an Italian politician, general, and Senator of the Kingdom of Italy
Born in Turin on March 20, 1830, Alessandro Asinari of San Marzano enrolled in the Turin military academy leaving it t the age of 18 with the rank of cavalry lieutenant. In 1848 he took part in the First Italian War of Independence. in which he distinguished himself particularly in the Battle of Santa Lucia and then took part in the Crimean War in which he was promoted to lieutenant.
In 1859 he took part in the Second Italian War of Independence, being promoted to captain and becoming part of the General Staff after the Battle of San Martino where he also earned the Silver Medal of Military Valor. After the Battle of Castelfidardo he was promoted to major for war merit and then fought in the Siege of Gaeta and that of Messina where he obtained the knight's cross of the Military Order of Savoy. In 1866 after the Armistice of Villafranca and the Battle of Custoza, he obtained the cross from Officer of the Military Order of Savoy and was promoted to colonel.
After taking part in the capture of Rome in 1870, in 1877 he was promoted to major general, then lieutenant general in 1883, until he obtained command of the Alexandria Division. In the colonial field he was governor of Massawa in Italian Eritrea from 1887 to 1888 and commander-in-chief of the great expeditionary force sent to East Africa after the Dogali disaster Battle of Dogali. San Marzano guided his troops with caution and successfully faced the Ethiopian army which eventually had to retreat due to logistical difficulties.
He was Minister of War in the Di Rudinì IV Cabinet, Di Rudinì V Cabinet, and Pelloux I Cabinet.
Deputy for two legislatures, he was appointed Senator of the Kingdom of Italy on January 4, 1894, but had to give it up shortly after due to poor health and advanced age. King Umberto I, who held him in great esteem, appointed him his secretary in the Order of Saints Maurice and Lazarus and later King Vittorio Emanuele III awarded him the collar of the Supreme Order of the Most Holy Annunciation.
He died in Rome after a long illness on February 16, 1906.