| Conventional Long Name: | League of Cambrai |
| Image Map Caption: | Northern Italy in 1494. |
| Map Width: | 300px |
| Status: | Military coalition |
| Era: | Early modern period |
| Date Start: | 10 December |
| Year Start: | 1508 |
| Event End: | Dissolved |
| Date End: | 24 February |
| Year End: | 1511 |
The League of Cambrai was a military coalition against the Republic of Venice formed on 8 December 1508, by the main European powers (Holy Roman Empire, Spain and France), to maintain their hegemony over the Italian Peninsula.
The following were members of the League: Maximilian I (Holy Roman Emperor), Louis XII (King of France), Ferdinand II of Aragon (King of Naples and Sicily), Julius II (Sovereign of the Ecclesiastical State), Alfonso I d'Este (Duke of Ferrara), Carlo III (Duke of Savoy), Francesco II Gonzaga (Marquess of Mantua) and Vladislaus II (King of Hungary).
The treaty was signed in the Picard town of Cambrai. In its preamble, a stated pretext for the treaty is peace between the Holy Roman Emperor and the Duke of Guelders, mediated by Spanish and Papal ambassadors. The following was also remarked against the Venetian Republic:The Treaty of Cambrai stipulated the following partition of Venice's mainland and overseas territories:
See main article: War of the League of Cambrai. For some time, Venice had developed suspicions of an emerging alliance against them, in some part due to hostile speeches by the French ambassador.[1]
The League fought against Venetian forces between 1508 and 1511. After they routed the Venetian army in Battle of Agnadello, they invaded Veneto and marched on Venice; however, they were defeated by Bartolomeo d'Alviano at the Siege of Padua. The Venetians began a counter-offensive campaign, retaking a large part of Veneto but suffering defeat at the naval battle of Polesella.
In 1510, Pope Julius II left the League and allied with the Venetians against France, having grown suspicious of French ambitions in Italy. The League of Cambrai was effectively dissolved the following year, when Spain and the Holy Roman Empire also abandoned the League to join Venetian and Papal forces in a new multi-nation alliance called the Holy League, designed to check French power.