Today was perhaps the most fantastic campaigning day I've ever had.
I'm playing as the Germanic tribes in RTR Platinum for BI.
It's been an absolutely fantastic game so far. I beat the Gauls real early, and quickly expanded south into northern Italy. There, the Romans and Ilyrians quickly declared war on me. Keeping momentum, I advanced to Delmatia and was within sight of Rome, before the tide turned and a brutal reposte, counter-riposte cycle began, where the Romans and I bled eachother dry. I was eventually forced out of Italy entirely after confiscating for myself a score of Roman Eagles, pretty much guaranteeing a continuation of hostilities with the Republic. After making progress on both the Iberian and Thracian fronts (invasions by the two forced a diversion of resources from the Roman front which is why I lost northern Italy), and advancing through the Pyranees, I was in the position - and the oppourtunity was created - to go on the offensive in Italy once more. A quick series of stunning victories resulted in the systematic liquidation of every Roman legion in north Italy, and I quickly advanced to Rome, where, after a brief repulse (my army routed in front of the Imperial Palace itself

) I marched into the city. With fresh forces crossing the River Po, the Roman front will soon be brought to a successful conclusion. This naturally does not bode well for the Iberians, though the Ilyrians I cannot destroy, because it would effecticaly end my game.
You see, the Macedonians have taken it upon themselves to recreate Alexander's Empire. They are by far the hegemonic power, controlling more than 70 provinces (compared to my 27) and an empire from Appolonia to Susa. The AI being the AI, it will go to war with you if you are adjacent to them. To put it simply, the Ilyrians are guaranteed existence by me, because their absorbtion means imminent war with Macedon, and from experience, I know I cannot beat them, especially while significant forces are tied up in Iberia and the Russian steppe.
The best way to illustrate the situation here is this quote from Marshal Ferdinand Foch during the Second Marne in 1918:
"My centre is giving way, my right is in retreat; situation excellent. I am attacking."
These are a series of absolutely amazing victories, battles in which my forces were very heavily rated against, battles I should have lost, or battles that were just too one-sided to ignore.