The reign of Karl VI: 1711-1740
He was a true namesake of Karl V the Great and Karl the Great. Enough said. His descendants would dub him 'The Conqueror'.
He inherited Austrian and Imperial thrones in April of 1711. In less than two years he declared war on Venice - with a goal of conquering the city of Bremen - a Venetian ally in the northern lands of the Holy Roman Empire. No small challenge it was for both cities were supported by Poland and Hungary.
The Venetians did their best to seek out and destroy Imperial navy. The Austrians did their best in avoiding them. Seeing their strategy fail the merchant republic invaded Austrian islands of Corsica and Sardinia. The Emperor crushed the Venetian armies in Italy and started the siege of the city.
In the north the heavy fighting broke out between Polish and Imperial armies. The conscripts of Bremen were crushed rather earlier and the fall of the city did nothing to inspire the Poles.
Combined armies of Poland and Hungary mounted a successful offensive into Bohemia. However, once they captured the province of Silesia, their desire to fight melted away. With Imperial armies on the move from Bavaria, the enemy broke into small divisions and set out to raid Austrian lands - the decision that cost them the campaign and the war.
In March of 1715 Hungary paid 50,000 ducats for peace. Imperial Northern Navy landed 3,000 men in Narvik, forcing Bremen to sue for peace and cede this Scandinavian province to the Emperor. Seeing this, Sweden immideately declared war - Narvik was theirs by right and they would not tolerate the Emperor and the Pope in their northern lands. Brandenburg joined the war on the side of Sweden.
Muscowy declared war on Poland, easing the pressure on Imperial armies. Poland did last a little longer, but had to capitulate in the face of a large-scale invasion into the heart of Poland, paying 200,000 ducats. Soon the peace with Venice was reached. The republic paid 300,000.
Meanwhile, the forces of Brandenburg suffered one defeat after another. Soon Brandenburg had to pay 90,000 ducats and cede the province of Brandenburg to Austria. After losing several small expeditions on the shores of Pomerania, Sweden too accepted peace and pay minimal tribute.
The year was 1717, the war that lasted four years just ended. But Karl VI was not about to stop. Swiss found themselves the next target of the Emperor's greed. They fought bravely, invading and capturing the province of Savoy. However, as soon as they did it, three Imperial armies cornered them there by taking positions at France-Comte, Bern and Piemonte. Faced with starvation, half of the Swiss army attacked the Imperials at France Comte and died fighting for their freedom. The other half was annihilated a month later by the Imperial army from Piemonte. They failed their comrades, refused to attack and died like rats under the boots of the Austrian landsknechts.
In spring of 1719, after the capture of Bern, Swiss federation was no more.
Few months before rather disturbing news came from the north - Bremen was annexed by the Muscowites.
It took the Emperor couple of years to prepare his armies for the next round of conquests. When the time came he promptly declared war on Muscowy. As the ruler of Holy Roman Empire it was Karl's duty to protect its borders from foreign powers. As the conqueror, he saw a chance to add yet another Imperial province to his domain.
The war lasted three long years. The battles in the northen Germany were easily won - Muscowites had to retreat across hostile Polish lands and all perished to a man. Imperial navy, rather weak in comparison to England's and Sweden's, ruled the seas when it came to challenging small Russian naval force. Couple of engagements in Narvik sent Muscowites back where they came from and by 1523 Austrians landed in Kurland, taking the fight to the enemy.
During this time, Sweden declared war again and Brandenburg followed... again. Not a wise decision for the Swedish ally. It was conquered and annexed in a matter of months. As for Sweden, the Emperor chose to cede Narvik to get Swedes off his back. Fighting the Czar was not a walk in the park and the province of Narvik had no value to the Empire. Thus came the first Austrian defeat in nearly two centuries. Even then, it was more of diplomatic victory as it allowed Austria to secure her northen border.
The Czar capitulated in 1724, ceding Bremen. His country was attacked by the Khanates to the east and south and he had no desire to fight hard for some German cities. Still, it gave the Emperor a right to boast that first Rome had defeated the Second and the Third - one Muslim and another Orthodox.
The big news during the war was the annexation of Hungarian lands by Polish crown. Now one big Catholic state spread along the eastern border of the Empire. Karl was curious whether he should befriend it or vassalize it and then befriend it.
In 1726 the Turks declared war on their Muslim brothers in Bulgaria. The outcome was rather obvious - Bulgaria ceded Rumelia and Macedonia. These two provinces were conquered previously from Turks by the Austrians. The land was fertilized with Austrian blood. Karl VI would not be the Emperor if he let this conquest of the Ottomans last.
But this could wait another couple of years. In the meantime, Karl VI started negotiations with his vassal, Duke of Burgundy, the goal of which was to incorporate the Duchy into the Empire. When it happened in 1727, Karl VI claimed the Holy Roman Empire a descendant of the Charlemagne's Empire of the West and himself a rightful ruler of all lands north of the Pyrenees and west of Poland.
In May of 1729 the Ottomans continued their jihad against the Christian nations of the Balkans by declaring war on Hellas. In June of 1729 they found themselves at war with the Holy Roman Empire as well. A bit more than they bargained for. Karl VI ordered Pope to call for a crusade and took up the sword himself.
From that point to the time of his death in 1740 he would spend his time in Turkey, fighting the infidels.
For eleven years combined armies of the Empire and Kingdom of Hellas fought the infidel, finally capturing all the Ottoman lands in the Asia Minor. Turkish Sultan fleed to Rhodes, where he locked himself up in the citidel that was built by the Knightes of Rhodes and protected himself with 40,000-strong army. Imperial navy failed to break the Ottoman navy, while Turkish pirates sank 22 Austrian transports in what was a pathetic attempt to sneak 10,000 crusaders on the island. Meanwhile, Turks continued to assault Sicily from what remained of their empire in NorthWest Africa.
In 1740 all of Turkey was occupied by the Imperial forces and Empire's vassals. Karl VI traveled to Sicily and defeated several Ottoman armies, when a random Turkish bullet killed him at the walls of Messina. His daughter Maria-Teresa became first Empress in the history of the Empire.
A year later Maria-Teresa would make peace with the Ottomans, receiving Rumelia and Bujak and leaving the enemy at the mercy of their archenemy - the Greeks. At the time of the peace the Kingdom of Hellas held Adana, Smyrna, Macedonia and Albania and was besieging Constantinople itself. The Kingdom of Serbia declared war on the infidel Bulgars. With little luck they would change the map of the Balkans forever.