Here's one from my last game...
The map was more or less a terra map with my civ situated on the islands near what would be indonesia (sp) on Earth. The major war took place in what would be Europe. I set up the game with the Germans in northern Europe and Rome in southern Europe on a little 'boot' in the mediteranean. There had been roughly three hundred years of conflict (after nearly an entire game where all of Europe and myself had been allied along with the egyptians).
The first set of engagements pitted the massive medeval Germans against the highly trained smaller Roman army during the years of 1650-1700. During this first conflict I sided with the Romans to help diminish the quite powerful Germans. It allowed me to set-up the Byzantines in the area that would be France.
Between 1700-1850 there were minor border skirmishes between the two that were put to rest by me interjecting and paying someone off. However, around 1850 I had enough with the arrogant Ceasar. It was odd but you could actually see in the game Ceasar changing the way he played because he was the dominant power in Europe. He would even try bullying me around. It was about 1870 when my forces were dispatched and was the largest war this game had seen to date. I sent a landing force to the iberian peninsula with 3 divs of rifleman (9 units), 3 divs of cannon, and 2 divs of cavalry. To capture the smaller islands and eventually the Roman boot, I sent in 2 divs of rifleman, 2 divs of cannon. Finaly I sent 3 divs of rifleman, cannon, and cavalry from my city located in the 'Holy Land' to the Roman Empires Eastern borders. My navy comprised of about 24 ships between 3 fleets with 'ship-of-the-lines' and frigates.
The initial landing went great as I conquered western iberia, followed by eastern iberia, and then linked up with the Byzantines in france to set about moving into the Roman homeland (something which had never happpened before in the game). The iberian divs and the Roman boot divs pushed their way towards Rome effectively sandwiching the entire empire. The 'boot' divs were held up in middle italy and the iberian divs were held at Cumea (on purpose to help allivate the stress in the other campaigns). The eastern army was charged with holding the lines in the east to avoid unwanted attacks into the middle east by the Romans, or other nations attempting to come into Rome. By about 1914 the war was effectivly over, and Europe was in shambles.
I was able to quickly bring Europe out of depression by instituting worker corps in the captured lands and giving jurisdiction to the Byzantines over western and central Europe. One more large scale war would occur in Europe constituting the First World War, but it was 50 years (100 turns) away. The war changed the entire game, forced old large empires into small nations, and developed a league of nations under the alliance of Huberia (me), Byzantium, Rome, Eygpt, and America (new world landmass).