Well thing's got interesting in my Prussian Campaign. At first it was business as usual, thrashing the Spanish and slowly taking their European territories. Eventually I took their last European holding, Portugal, before planning an invasion of their North African territories. However Russia at that point decided to declare war on my largest trading partner, the Ottomans, so I had to cancel my plans for North Africa and assist my allies against the Russians. I was in a mixed position when war broke out, as my Northeast front was secure, but my Southeast front in the Ukraine was vulnerable. Sure enough a mass of Russian troops began massing in the Eastern Ukraine, though strangely enough they seemed to be moving northwards.
I decided to build an army in the Northeast and launch an offensive, so I could buy time for Kiev to build up it's defences. The offensive managed to get me Livonia and Ingria, which managed to divert Russia's southeastern armies away from Kiev. Even better, they were scattered and low-strength, and walked through my heavily fortified East-Central European territories. I subsequently destroyed those Russian armies in detail. However a few more Russian armies came from the south into the Ukraine, likely from their Afghan/Persian campaign, and raided my farms and mines. Fortunately my defences in Kiev had been fortified by then, and I created a mixed calvary/artillery force to deal with the raiding armies. Unfortunately fortified Russian infantry defeated that force in an attempt by me to uproot them from one of my towns. Why I thought I didn't need infantry is anyone's guess.
I took the remnants of that army, regrouped at Kiev and added infantry to my replenished calvary and artillery. On my second try I routed the various Russian raiders, and temporarily cleared the Ukraine. After that there was a brief lull, and I sent a naval taskforce from Taranto, Southern Italy into the Black Sea, and established naval supremacy in the area after defeating the two Russian fleets there. After that I sent a newly created army, as well as the the light force from the Ukraine into the Crimean Peninsula. My light army dealt with the few scattered regiments in the area, while my new army captured the regional capital, securing for me total supremacy of the Black Sea, and providing me with an FOB for future campaigns down south. During this time I also repulsed an offensive into Central Europe, and established complete control of the Baltic Sea. After that it was just developing my new territories, replenishing my armies and fending off the occasional raid.
With my Eastern Front relatively quiet and secure, I decided to try and continue my plans for North Africa. I had just completed an army in Spain, and put them on transports when something unexpected happened. My long-time ally Austria attacked the Ottomans, forcing me to choose between breaking my alliance with the Ottoman Republic, or going to war with Austria. Austria at this time was scattered and a shell of it's former self in the earlier part of the game, and seeing as how trade with the Ottomans was more economically beneficial than Austria, I went to war against Austria. Apparently I had failed to notice their earlier massing of armies at my border, because as soon as war broke out they launched a blitzkrieg which netted them Wurttemburg and Hungary, and left me in a teneous position. I had no field armies in Germany, and I had gradually reduced my city garrisons in the region, foolishly thinking they were safe.
I had to act quickly. My French and Westphalian garrisons were strong, but Silesia and Munich were very vulnerable. I made peace with the Russians, and rushed my Eastern armies as quickly as I could to Germany. During that time I raised an army near Berlin, and frantically tried to bolster my Munich garrison. At one point I was given the option to intercept an Austrian army with my Munich garrison, and seeing as the odds were in my favour I did so, only to have my army thrashed and sent back to Munich. The Austrian army then besiged Munich, leaving me with only five turns to finish my Berlin army and rush them over to lift the siege. Fortunately I was able to rescue Munich in time, and I sent the Austrian army retreating into Italy. Remember that North African invasion force I created as well? I was able to divert them over to Europe, and with them I retook Wurttemburg, as well as capturing Alsasce-Lorraine in the process. The tide turned finally whem my two Eastern field armies arrived, and along with an army created at Warsaw I used them to take Vienna and deal a crushing blow to the Austrians. With the fall of Vienna Austria was left with only Serbia and Croatia. I used the Warsaw army and one of Eastern armies to finish off Austria, and wipe them off the map. With the end of the Austro-Prussian War of 1822, I had established myself as the largest great power in Europe. During the Austrian war Venice had entered the war on Austria's side, so I took Venice as well. Unfortunately Venice had managed to take the Ottoman capital of Istanbul, so it remains to be seen if the Ottomans will survive, or if I'll take over the Ottoman Republic from the Venetians.