War of the League of Cognac
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Was one of the so-called Italian Wars. It was fought between the Habsburg dominions of Charles V —primarily the Holy Roman Empire and Spain— and the League of Cognac, an alliance including the Kingdom of France, Pope Clement VII, the Republic of Venice, the Kingdom of England, the Duchy of Milan, and the Republic of Florence.
Chronology
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June 1527: Carpi is acquired by the Este, as part of the Duchy of Modena.
January 1528: The Republic of Siena looses control of Porto Ercole, which is conquered by Papal troops.
January 1530: Lombardy was reconfirmed to the Sforzas.
January 1530: The remaining Venetian possessions in Apulia went to Charles of Naples.
Was the invasion of Lombardy by the Imperial and Spanish forces during the War of the League of Cognac.
July 1526: Holy Roman emperor Charles V sends an army under the command of the Constable of Bourbon to Italy. He comes to lay siege to Milan, which capitulates.
Was the invasion of Central Italy by the Imperial forces that ended with the Sack of Rome, during the War of the League of Cognac.
February 1528: The Imperial Army, led by Charles V of Spain, left Latium in 1528 after being brought back under control by new leaders and receiving payment. The army, consisting of approximately 12,000 men, then moved on to Naples on February 17, 1528, following the army of the league.
May 1527: After the conquest and sack of Rome by the troops of Emperor Charles V, the imperial army de facto controlled Latium.
Was a revolution in the Duchy of Florence during the War of the League of Cognac.
May 1527: The third republican government of Florence began on May 16, 1527 following the very serious crisis that arose in relations between Pope Clement VII (Giulio de' Medici) and the emperor Charles V. The citizens of Florence decided to expel the Medici and restore a Republic following the Piagnone model (i.e. religious puritanism), inspired by the directives of Girolamo Savonarola.
Was the French invasion of Lombardy during the War of the League of Cognac.
June 1529: In 1529, France suffered a defeat at the hands of the Imperial troops at Landriano, resulting in the loss of control over the Duchy of Milan, along with Lombardy and Liguria.
September 1527: The French army led by Lautrec takes Genoa in August 1527.
October 1527: French forces occupy Alessandria.
October 1527: Pavia is sacked by French forces led by general Odet de Foix.
Was the French invasion of Naples during the War of the League of Cognac.
August 1528: An epidemic in Naples in 1528 led to the retreat of the French army from the region.
May 1528: Siege of Naples.
Was a treaty between the French king Francis I and the Spanish Habsburg emperor Charles V that ended the French involvement in the War of the League of Cognac.
August 1529: The final Treaty of Cambrai, signed on 5 August, removed France from the war, leaving Venice, Florence, and the Pope alone against Charles. Francis surrendered his rights to Artois, Flanders, and Tournai.
The Medicis were restored as the rulers of Florence.
August 1530: The republican government of Florence lasted until 1530, when it was demolished at the end of the Siege of Florence by Spanish and German troops sent by the emperor following a reconciliation between pope Clement VII and emperor Charles V.
Selected Sources
Strathern, P. (2007): The Medici: Godfathers of the Renaissance, London (United Kingdom), pp. 308-321