26 Wars of the Guelphs and Ghibellines

The Guelphs and Ghibellines were factions supporting the Pope and the Holy Roman Emperor, respectively, in the Italian city-states of central and northern Italy. During the 12th and 13th centuries, rivalry between these two parties formed a particularly important aspect of the internal politics of medieval Italy. The struggle for power between the Papacy and the Holy Roman Empire arose with the Investiture Controversy, which began in 1075, and ended with the Concordat of Worms in 1122. The division between the Guelphs and Ghibellines in Italy, fuelled by the imperial Great Interregnum, persisted until the 15th century.

The Battle of Desio was fought on 21 January 1277 between the Della Torre and Visconti families for the control of Milan and its countryside. The battlefield is located near the modern Desio, a commune outside the city in Lombardy, Northern Italy.

The Battle of Forlì in 1282 took place between an army recruited in France, sent by Pope Martin IV in an attempt to subdue Forlì and the Ghibellines. The Guelph army was defeated thanks to the strategic ability of Guido I da Montefeltro. The event was remembered by Dante in the Divine ComedyThe city which once made the long resistance, And of the French a sanguinary heap

The naval Battle of Giglio was a military clash between a fleet of the Holy Roman Emperor Frederick II and a fleet of the Republic of Genoa in the Tyrrhenian Sea. It took place on Friday, May 3, 1241 between the islands of Montecristo and Giglio in the Tuscan Archipelago and ended with the victory of the Imperial fleet.

The Battle of Montebruno was a battle between the Guelph City of Asti and the Ghibelline County of Savoy. Thomas II of Savoy invaded the territory of Asti, but he was defeated by the Astigiani army at Montebruno in Garzigliana, near Pinerolo. Thomas II had taken refuge in Turin, however there he was captured.

The Battle of Benevento was a major medieval battle fought on 26 February 1266, near Benevento in present-day Southern Italy, between the forces of Charles I of Anjou and those of King Manfred of Sicily. Manfred's defeat and death resulted in Charles' conquest of the Kingdom of Sicily, effectively ending the rule of the Hohenstaufen dynasty in the Italian Peninsula and marking the rise of the royal Capetian House of Anjou. The engagement was part of the conflict which pitted Guelphs against Ghibellines.

The Battle of Campaldino was a battle between the Guelphs and Ghibellines on 11 June 1289. Mixed bands of pro-papal Guelf forces of Florence and allies, Pistoia, Lucca, Siena, and Prato, all loosely commanded by the paid condottiero Amerigo di Narbona with his own professional following, met a Ghibelline force from Arezzo including the perhaps reluctant bishop, Guglielmino degli Ubertini, in the plain of Campaldino, which leads from Pratovecchio to Poppi, part of the Tuscan countryside along the upper Arno called the Casentino. One of the combatants on the Guelph side was Dante Alighieri, twenty-four years old at the time.

The Battle of Cassano was fought in the Autumn of 1259 between a Guelph and a Ghibelline army in Northern Italy.

Codex Balduini Trevirensis, is an illustrated chronicle made c. 1340 for Baldwin of Luxemburg, archbishop of Trier and brother of the late emperor Henry VII.

The battle of Colle di Val d'Elsa took place between 16 and 17 June 1269 at Colle di Val d'Elsa between the Ghibelline troops of Siena and the Guelph troops of Charles of Anjou and Florence, represented by fewer than 200 knights commanded by Neri de' Bardi.

The Company of Death is the name used in the historical literature of English language for two related chosen tactical corps, two selected bands of warriors, entrusted to guarantee the cohesiveness and efficiency in battle of both the Milanese and Lombard League's militias through their bond by oath to the defence of the Milanese Carroccio, the wagon on which the standard of the Lombard allies stood.

The Battle of Cortenuova was fought on 27 November 1237 in the course of the Guelphs and Ghibellines Wars: in it, Holy Roman Emperor Frederick II defeated the Second Lombard League.

The Battle of Fossalta was an episode of the War of the Guelphs and Ghibellines in Northern Italy. It took place in Fossalta, a small location on the Panaro River, and is especially remembered for the capture of Enzio of Sardinia, son of Emperor Frederick II of Hohenstaufen.

The Battle of Legnano was a battle between the imperial army of Frederick Barbarossa and the troops of the Lombard League on May 29, 1176, near the town of Legnano in present-day Lombardy, in Italy. Although the presence of the enemy nearby was already known to both sides, they suddenly met without having time to plan any strategy.

The Lombard League was a medieval alliance formed in 1167, supported by the Pope, to counter the attempts by the Hohenstaufen Holy Roman Emperors to assert influence over the Kingdom of Italy as a part of the Holy Roman Empire. At its apex, it included most of the cities of Northern Italy, but its membership changed with time. With the death of the third and last Hohenstaufen emperor, Frederick II, in 1250, it became obsolete and was disbanded.

An uprising of the Guelph faction in Milan led by Guido della Torre on 12 February 1311 was crushed by the troops of king Henry VII still on the same day.

The Battle of Montaperti was fought on 4 September 1260 between Florence and Siena in Tuscany as part of the conflict between the Guelphs and Ghibellines. The Florentines were routed. It was the bloodiest battle fought in Medieval Italy, with more than 10,000 fatalities. An act of treachery during the battle is recorded by Dante Alighieri in the Inferno section of the Divine Comedy.

The Battle of Parma was fought on 18 February 1248 between the forces of Holy Roman Emperor Frederick II and the Guelphs. The Guelphs attacked the Imperial camp when Frederick II was away. The Imperial forces were defeated and much of Frederick's treasure was lost.

The Battle of Pieve al Toppo was a battle fought between Arezzo and Siena. The two sides engaged in the battle, and Arezzo was able to take the town. Later on in history, Florence would take over the town, and Arezzo was forced to retake it all over again.

Ezzelino III da Romano was an Italian feudal lord, a member of the Ezzelino family, in the March of Treviso. He was a close ally of the emperor Frederick II, and ruled Verona, Vicenza and Padua for almost two decades. He became infamous as a cruel tyrant, and was, in fact, the most "notorious" of the "early tyrants".

The Siege of Crema was a siege of the town of Crema, Lombardy by the Holy Roman Empire from 2 July 1159 to 25 January 1160. The Cremaschi tried to defend their city from the Germans, but were eventually defeated by Frederick Barbarossa's men. Frederick seized Milan in 1162 shortly after he took Crema. These events started the wars of Guelphs and Ghibellines, leading to the formation of the Lombard League, a league of northern Italian communes allied against the emperor, supported by the Pope.

Henry VII was the King of Germany from 1308 and Holy Roman Emperor from 1312. He was the first emperor of the House of Luxembourg. During his brief career he reinvigorated the imperial cause in Italy, which was racked with the partisan struggles between the divided Guelf and Ghibelline factions, and inspired the praise of Dino Compagni and Dante Alighieri. He was the first emperor since the death of Frederick II in 1250, ending the Great Interregnum of the Holy Roman Empire; however, his premature death threatened to undo his life's work. His son, John of Bohemia, failed to be elected as his successor, and there was briefly another anti-king, Frederick the Fair contesting the rule of Louis IV.

The Battle of Tagliacozzo was fought on 23 August 1268 between the Ghibelline supporters of Conradin of Hohenstaufen and the Guelph army of Charles of Anjou. The battle represented the last act of Hohenstaufen power in Italy. The capture and execution of Conradin several months after the battle also marked the fall of the family from the Imperial and Sicilian thrones, leading to the new chapter of Angevin domination in Southern Italy.

Azzone Visconti was lord of Milan from 1329 until his death. He is considered the founder of the state of Milan, which later became a duchy.

The War of the Bucket or the War of the Oaken Bucket was fought in 1325, between the rival city-states of Bologna and Modena. It took place in the region of Emilia-Romagna in northern Italy. The war was an episode in the over 300-year-long struggle between Guelphs and Ghibellines. Modena won the Battle of Zappolino, and the bucket remains in Modena to this day.