Siege of Turin (1640)

For other siege of this city in 1706, see Battle of Turin.

Date	22 May – 20 September 1640
Location	Turin (present-day Italy)
Result	Franco-Piedmontese victory

Belligerents

France

Regency faction

Spain

Prince Thomas faction

Commanders and leaders

Strength

9,500 French
3,500 Piedmontese

16,000 Spanish
unknown Piedmontese

Casualties and losses

Unknown

Franco-Spanish War (1635–59)

Les Avins Leuven Tornavento Somme Getaria Fuenterrabía Saint Omer Thionville Salses Cádiz Turin Montjuïc Arras 1st Tarragona] La Marfée 2nd Tarragona Perpignan Honnecourt Barcelona Lerida Cartagena Rocroi 2nd Lleida Orbetello Lens Cambrils 2nd Barcelona Bordeaux Tortuga Arras Valenciennes The Dunes Dunkirk

The 1640 siege of Turin (22 May–20 September 1640) was a major action in two distinct wars: the Franco-Spanish War (1635–59) and the Piedmontese Civil War. When Thomas Francis, Prince of Carignan and his Piedmontese faction captured Turin, the French garrison supporting the Regent Christine Marie of France retired within the citadel and continued to resist. A Franco-Piedmontese army led by Henri de Lorraine, count of Harcourt and Henri de la Tour d'Auvergne, Vicomte de Turenne invested the forces under Prince Thomas within the city. Finally, a Spanish army under Diego Felipez de Guzmán, Marquis of Leganés appeared and encircled the French besiegers. In this bizarre triple siege, the Spanish army surrounded the French army which surrounded Prince Thomas' Piedmontese who surrounded the citadel. In the end the French prevailed; Prince Thomas surrendered on terms and was allowed to march his troops elsewhere, leaving Turin in French control. Turin is a major city in the northwest part of modern-day Italy.

Background

Thomas Francis, Prince of Carignan and his supporters had seized the city of Turin in 1639, but French troops supporting the Regent Christine Marie of France continued to hold the citadel. Under normal conditions in this period, it was not possible for a town to be held against a hostile citadel, but the anti-French forces managed to construct barricades that contained the French in the citadel, and spent the winter of 1639–40 under an uneasy truce. On 10 May, the French army under Henri de Lorraine, count of Harcourt and Henri de la Tour d'Auvergne, Vicomte de Turenne, supported by troops raised by Regent Christine, invested Turin, and thus started what became one of the most famous and complicated military events of the 17th century. The French army counted 6,000 foot soldiers and 3,500 cavalrymen. The French were supported by 3,500 Piedmontese.

Double siege

After pushing in most of the defenders' outposts and building the usual lines of investment, the besiegers opened fire on 22 May. On 31 May a Spanish army under the governor of Milan, Diego Felipez de Guzmán, Marquis of Leganés, approached, but despite his numerical superiority dared not make a full-scale assault on Harcourt's lines, so he himself began to entrench around the French, starting a weeks-long conflict over individual posts but, despite constant pressure from Prince Thomas, only once risking an outright battle, in mid-July (14 July according to Saluzzo, 11 July according to Hanotaux and Bérenger), when he was thoroughly repulsed. The situation was particularly complicated in that Prince Thomas in Turin continued for weeks to hold some posts outside the city, ensuring some contact with the Spanish and a line of communication for supplies; the last such post fell to Harcourt late in July, and after this, food shortages began to hit the population and garrison - forage for horses ran out first, and Thomas twice attempted sorties, on 23 and 31 July, intended to enable his cavalry to escape, but failing both times. Harcourt was never completely cut off by Leganés from his lines of communication, and he was of course in contact with the citadel, but it is fair to agree with the traditional view that this had now become a four-layered siege: French troops still in the citadel were under attack by Thomas in the city, who was himself besieged by Harcourt and the French army, who was himself besieged by Leganés. It is sometimes suggested that Leganés tried to fire supplies over the French camp into the city, but this may be a legend, built on the fact that the Spanish did maintain written contact with Prince Thomas by messages placed inside cannonballs and fired over the French heads.

Surrender

Turin eventually had to consider surrender, and Prince Thomas, who had maintained on-off talks with the French and the Regent throughout the siege, opened negotiations with Harcourt, who made an agreement contrary to orders - if the French historian Hanotaux is to be believed, he was unaware of orders en route from Paris that he was to accept nothing from Thomas except pure surrender as a prisoner or agreement to enter French service; according to Saluzzo, Harcourt knew that Cardinal Richelieu's agent Mazarin was on his way with orders but wanted to avoid sharing the glory of a victory with anyone else so hastened to reach a settlement before Mazarin arrived. Whatever the cause, Harcourt agreed a cease-fire on 16 September and granted Thomas honourable terms in the capitulation signed on 20 September, and on 24 September Thomas marched out with his troops and withdrew to Ivrea.

Sources

Saluzzo, Alessandro di. Histoire militaire du Piémont. Turin, 1859 (vol. 4, pp. 121–41)
Hanotaux, Gabriel. Histoire du cardinal de Richelieu. Paris, 1933-1947 (vol. 6, pp. 43–5)
Bérenger, Jean. Turenne. Paris, 1987 (pp. 159–60)

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