What began as an ordinary session quickly became something different. In March 1680, the last of the Lancasters died in Britain, and Britain entered a personal union with the great central European power, Austria. The British were not thrilled with this happening, and nor were the other European powers, as it greatly threatened the balance of power in Europe.
And amongst the documents in the Lancastrian castles in London was a pact, inked two decades prior, between the Ottoman Empire and Britain. This pact pledged that both sides would work together to prevent further Austrian expansion via personal unions - although it had been anticipated that Austria would gain them through claims on thrones and obscure documents, not purely luck with a royal marriage. The British nobles and the Ottoman Empire agreed to invoke their pact, and preparations began.
However, Austria was keen to the threat of Britain breaking out of the pact, and not desiring this, beat Britain to the punch by a couple weeks. On July 2, 1680, Austria declared war on Britain's vassal Inca, thus causing a war with the people of Britain, despite their technically being in a personal union with Austria. This ensured that Britain itself could not declare war on Austria in order to end the personal union.
The following month, the Ottoman Empire declared war on Austria, fulfilling their part of the pact. Throughout the fall, the Ottoman and Austrian troops marched around the borders, but there was, at first, little combat. By the end of the year, the Ottomans occupied Dalmatia, Croatia, and Carpathia, but no major battles had occured.
In November, Burgundy declared war on Austria, having decided it wise to intervene to maintain the balance of power while they could. Unfortunately for Burgundy, Castille would fight on Austria's side, which would prove to be a major pain point.
At sea, meanwhile, the Austrian fleet managed to defeat the British one off the shore of Albania, and would later block the Dardanelles, slowing the Ottoman reinforcements who now had to march north of the Black Sea. The Ottoman navy, half of which was in the East Indies, was at the time unable to issue a challenge.
Burgundy and Britain would begin a slow campaign forward towards Swabia, and would be helped by Frankfurt, who declared war on Austria and brought their moderately sized but skilled army to the fight. In the south-west, Britain and the Ottomans coordinated to take Austria's center of trade in Genoa, and to start taking the Alps. However, the western front would stabilize for Austria in 1681. Frankfurt accepted white peace, and Burgundy was forced to fall back due to the advancing Castillians. By late summer, the British and Ottoman troops were outnumbered and in disarray, having lost defensively in the Alps, and the Ottoman part of the force defeated. Genoa was retaken, although at the present Britain still occupies Savoie and has their army in the region.
So it was that by early winter 1681, Burgundy accepted an offer of white peace for Austria. Despite British and Ottoman wishes, the situation with war exhaustion, the Castillians, and Burgundy's seemingly never-ending Time of Troubles was simply becoming overwhelming.
The Eastern Front, however, brought advances to the allied forces in 1681. The first major battle came in the spring, when 50,000 Ottoman forces gained a victory over 60,000 Austrians at Osijek, on the Ottoman frontier. A few months later, 100,000 Ottomans would defeat 50,000 Austrians at Szolnok, in the Hungarian part of Austria's empire, and follow that up with another victory at nearby Partium. This would allow the Ottomans to take additional provinces, including Partium, Szolnok, Ersekujvar, Somogy, and intermittently, Sopron. A northern detachment also took Sungau II (formerly Sierdraz) without opposition.
Still, Austria had forces in the area, and would bring them to bear. In the fall of 1681, the Austrians would defeat Ottoman armies at Sopron and again at Slavonia, forcing them to retreat to Osijek, where they are presently in battle with three battered Ottoman armies led by none other than Padishah Isa I himself.
Meanwhile, the Ottoman navy's challenge to Austria in the autumn of 1681 proved to be disastrous. With the other half of their navy having arrived from the East, the Ottomans engaged Austria in the Aegean. Although some minor victories were seen over Austria's small blockade detachments, in the main battle, Austria was indisputably the victor, with the Ottomans losing approximately 20 capital ships in addition to several smaller vessels. The Ottoman naval commanders have identified their large proportion of obsolete ships, such as carracks and barques, as a primary cause for their defeat despite equal to slightly superior numbers.
But the Sultan has received good news as well, for just last week, the Ottoman Empire captured Vienna, on the day after Christmas. Ferdinand IV Gryf of Austria will now have to fight his way to the great palaces in Vienna. However, despite the morale boost for the Ottomans, this is hardly a decisive blow to Austria, Vienna having been occupied several times previously, most recently in 1624 by Bavaria.
The Scandinavian front has been, overall, fairly quiet, despite some British and Burgundian attempts to stir it up. The Swedes and Norwegians especially have been thankful for their relative peace.
Another northern front existed in Siberia, where Novgorod declared war on the Ottomans in late 1680. Although Novgorod never posed a serious threat, they did keep a detachment of the Ottoman army occupied before accepting a white peace in 1681, once their defeat was imminent.
In North America, Burgundy occupied all of Austria's coastal provinces, but due to the situation in Europe, was unable to make much of these gains.
In South America, meanwhile, the Inca have been occupied, but elsewhere the guns have been quiet.
And in China, Qin joined the alliance against Austria. Austria, however, had respectable numbers of troops in China, and was able to exact modest tribute from Qin. During that war, the Ottomans made small advances into Austrian China, but due to superior Austrian numbers in the region, were forced to fall back once Qin left the war, and Austrian has since reclaimed their Chinese provinces.
The outcome of the war is still very much in flux. Both Austria and the Ottomans are accumulating significant war exhaustion, but both still have large armies. The Western front may be stable for Austria at the moment, but British troops are still in the area. The Austrians also enjoy naval superiority at the moment, but must keep their navy concentrated lest the Ottoman or British navy scores a victory. And while Burgundy was forced to bow out of the war, the British are the only major participants who are not currently suffering war exhaustion issues.
Although most of the world has been embroiled in this war in some way, there still have been minor events elsewhere. Oldenburg was vassalized by Burgundy, ensuring their support in Imperial elections. Morocco lost some of their North American land to Spain, in an unsuccessful trade war. And Mazovia, though keeping out of the big wars in Europe, captured Muscowy and its Center of Trade from Ryazan this turn.
All other players, please feel free to add details. I know there was more happening on the western front than I've written about here, but not having been involved in much of it myself, I am not familiar with all the details. Also, I could include a global map, but there really isn't much that's changed besides the fronts in Europe.