Expedition of the Thousand Third Italian War of Independence 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.

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.

San Marzano guided his troops with caution and successfully faced the Ethiopian army which eventually had to retreat due to logistical difficulties.

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.