[1] Frederick came to the throne in the middle of the First Italian War, where the French invaded and were defeated in 1498 by the League of Venice. When France invaded Milan the very next year with the backing of Venice, Frederick came to the aid of Milan, viewing the French invasion of Milan as a threat his own Kingdom. The war was going well for Frederick, but in 1501 Frederick's Spanish relatives invaded Naples, siding with France. Frederick was able to hold off the enemy, but Milan soon fell. Realising he had to adopt a more offensive strategy, he sent a fleet to Venice, capturing it and forcing the Republic to capitulate.
Luckily for Frederick, Spain and France had recently gone to war over how to split the spoils of war. Frederick offered a defensive pact to Spain against France, which was accepted. Neopolitian and Spanish forces defeated the French in Milan. Spain also launched an invasion into Mainland France, conquering Toulouse. France gave up on the war soon enough, and a peace treaty was signed in 1504
Spain would keep Milan, and Frederick would return the city of Venice in return for a large sum of gold.
In 1508 War of the League of Cambrai broke out, but Frederick did not join the war.
Frederick died age 60 of natural causes, leaving the throne to his only son, Ferdinand, Duke of Calabria.
[2] Born in 15 December 1488 in Andria, Apulia as son of the future King Frederick and his second wife, Isabella del Balzo. He held the titles of Duke of Calabria and of Apulia.
In January 1505, Ferdinand married, Princess Sibylle of Bavaria, from the house of Wittelsbach, she was the daughter of Duke Albert IV of Bavaria-Munich (1447–1508) from his marriage to Kunigunde of Austria (1465–1520), daughter of Holy Roman Emperor Frederick III. The marriage came two months before the death of her older sister, Sidonie, who was engaged to Elector Palatine Louis V.
Together the pair would have five children, before Sibylle's death in 1519 at the age of 29. Following the death of his first wife, in February 1521, 33 year old Ferdinand married 15 year old, Christine of Saxony (25 December 1505 – 15 April 1549) producing another sixteen children.
There was talks of finding a third wife, with rumoured proposals to Mary, Princess of England or Archduchess Eleanor of Austria, (daughter of Ferdinand I, Holy Roman Emperor and Anna of Bohemia and Hungary), until his own death at the age of 63.
His ruling was seen as fair and just, supporting the Papal State financially against Venice, while holding a strained peace against France to the West. His support of Pope Leo X (1513-1536) and his successor Pope Leo XI (1536-1553 OTL Giovanni Salviati, who was Leo X nephew) gained him the title of "Blessed King Ferdinand, Holy Servant of God"
[3] Ferdinands grandson, Sebastiano, was quite impressive for a single reason - he managed to rule for a prolonged period and fend off several significant attempts to depose him whilst simultaneously being one of the most unliked monarchs in the history of Naples. Keen to delegate his responsibilities to his relatives and council, he rarely left his chambers, spent an increasing amount on clothes, wine, food and prostitutes, reportedly abused his slaves and some claim he murdered his wife (from an arranged marriage, it was common knowledge that they hated each other) when she attempted to leave him with their only son. At this point, he sent his son to be brought up by priests and passed a law that states his son must not set foot in the palace until he, Sebastiano, had died and walked into the embrace of God. Even attempted intervention by the Pope failed to sway him from being an awful person - perhaps the only thing that put down the attempted depositions was the fact that he had delegated so much power to his council and military leaders that they feared having the power removed by any subsequent ruler - and with his death in 1581, his son having vanished off the face of the kingdom after his banishment to a monastery, there was a host of aunts, uncles and cousins to pass the crown to, eventually being passed to his brother, Nicolo.
[4] As the younger brother of Sebastino, many were worried that Nicolo would turn out to be like his brother, so the first thing Nicolo did when he was crowned was found a new house for himself, the House of Naples. When he inherited the throne, the Royal coffers were drained and the country was heading towards a economic crisis.
Nicolo decided to reinvent the tax system, and cut unnecessary costs. This made him unpopular with his nobles, some of whom conspired against him, but nothing major ever came of it. Nicolo sold a number royal palaces and wore mostly plain clothes. Despite this, the economy had made a full recovery by 1593, and now Nicolo was looking to expand.
The Neopolitan colonies of Brasile del Nord (meaning North Brazil, stretches from the Amazon to modern day French Guiana) and the Bahamas, defending by a grand navy that Nicolo had built.
In 1600 Venice and Naples went to war over control of the Mediterranean. When Spain did not defend Naples from the Venetian aggressors, Nicolo was very angry, but did not show it to the Spanish, fearing possible backlash from the Habsburgs. In 1601, the Treaty of Venice was signed. The war was inconclusive, and was considered a waste of time, even by Nicolo himself. Regardless, Nicolo remained one of the most celebrated and popular Kings of Naples.
In 1607, Nicolo died of Cancer age 66, leaving the throne to son, Prince Frederick.
[5] Frederick, was born in 1571, son of Nicolo and his wife, Elisabeth of Austria, daughter of Maximilian II, Holy Roman Emperor, and Maria of Spain. This marriage was arranged as a Habsburg attempt to influence the running of Naples.
Growing up during the reign of his eccentric uncle, Frederick, would be educated by his father, regarding matters of state and foreign politics.
At the age of ten, he became heir following his uncles death and his father’s succession and would continue being tutored by his father and shadow him.
His marriage was arranged by his father to Maria de’ Medici at the Palazzo Pitti of Florence, Italy, the sixth daughter of Francesco I de' Medici, Grand Duke of Tuscany, and Archduchess Joanna of Austria.
The death of his father from cancer and Frederick succession, came at the age of 36 and his preparation set him in good stead, he was able to continue his father's strong economy policy assisted by colonial trade, helping to assist with the Navy and Army.
When Maria’s uncle, Cardinal and Grand Duke Ferdinando II of Tuscany died in 1609, King Frederick, claimed her father’s throne on behalf of her, uniting the two nations and elevating the later nation to a Kingdom.
To placate, Pope Julius III and his Papal State, who now found its self sharing borders with the Union of Naples and Tuscany, King Frederick would pledge loyal allegiance to his Holiness, signed a non-aggression agreement, along with a yearly "loyalty tax," a tax used by the Pope to invest in its army and navy.
His death in 1639, at the age of 68, came following three years of declining health. He was succeeded by his son, Prince Maximillian.
[6] Maximillian was the third son of king Frederick and the only one to survive untill adulthood. He was born in 1598 and named after his maternal grandfather emperor Maximillian II. By the time Maximillian was crowned king of Naples and Tuscany his grandfather's branch of the Habsburg family had died out and his distant relative Ferdinand III sat on the imperial throne. Ties with the Habsburgs remained strong nevertheless as Maximillian had married Ferdinand's sister Maria Anna (b.1610).
Wheras Italy had remained firmly catholic, Europe north of the Alps was ravaged by decades of religious warfare. The imperial forces had met with initial success but after more than 20 years it became apparent that the Habsburgs were fighting a loosing war. Backed by the French and other foreign powers protestant forces sacked Vienna in 1638, but the war was far from over. By 1640 most of the HRE was in protestant hands and church lands were distributed to protestant lords, including the archbishoprics of the Electors of Trier, Cologne and Mainz. With most of their lands occupied and the Electoral system of the HRE shattered the situation for the Habsburgs seemed dire.
In 1641 King Maximillian intervened on behalf of his brother-in-law emperor Ferdinand III and landed with his troops in Habsburg Croatia in an attempt to liberate central Europe. He marched northwards capturing Vienna before the end of the year and continued marching westwards towards Bavaria. The renewed warfare was a catastrophe for the local population with between 33-50% of the inhabitants of Lower and Upper Austria being killed during the course of the war. The catholic forces were moderatly successful and reached Franconia by 1643 but than the luck of the House of Austria ran out. Ferdinand's brother Leopold Wilhelm was killed on the battlefield before the emperor himself succumbed to fever, leaving the Habsburg family without adult males to take the crown.
In the Treaty of Passau Maximillian promised to defend the Austrian lands in exchange for Habsburg support for his claim to the imperial throne. With the electors of Trier, Cologne and Mainz living in exile and the Habsburgs at his mercy the election was a mere farce. Maximillian was elected emperor despite the fact that non of the electors who voted for him actually controlled their electorate (not even the Habsburgs as Bohemia was occupied by protestant troops).
To further cement his rather weak claim to imperial authority Maximillian left his troop in the hands of his generals and traveled to Rome to be crowned emperor by the pope (a tradition abandoned by the Habsburgs over a century ago). Both Maximillian and his father Frederick had been financially generous towards the pope but this came with a price. In the last decades papal economy and building projects had become increasingly dependent on those Neapolitan taxes. Both overland and naval trade became dominated by merchants from Tuscany and Naples and the minor lords of the Romagna soon cared more for the opinion of the Neapolitan kings than the pope's.
Despite the initial success the Neapolitans enjoyed in Germany the war once again swung in favour of the protestants. Not long after his return from Italy Maximillian and his allies were forced back towards Vienna. Tired of the ongoing war Maximillian once again left for Italy leaving the war to his generals and the Austrians, who felt rightfully betrayed by the emperor, who had pledged to defend their lands.
After almost three decades and the second sack of Vienna the Austrian forces of the young Archduke Ferdinand surrendered in 1646. In the Treaty of Ingolstadt the Austrians and Neapolitans accepted the loss of Bohemia and the independence of the German states not part of the Habsburg domain. The treaty was an utter humilitation for the House of Habsburg and showed that Maximillian was utterly uninteressested in fighting for the Austrian cause.
The second half of Maximillian's reign was rather uneventful. The center of power slowly moved to the north as the rich Tuscan lands became increasingly important for the finances of the dual kingdom. Maximillian died of throat cancer in 1651 after 12 years as king and 8 as emperor. Leaving his wife and their minor children. His reign is regarded as one of the most succesful in Italian history, wheras it is seen as a historical low point by German catholics.
He was succeeded by his daughter, Eleanora Maria Catalina of Naples.