(predator)
Link to Ancient Age spoiler
Overview
My Middle Ages began in 590BC and ended in 470AD.
I usually decide on a game goal before starting a game or fairly early in playing it. In this game I was undecided. As I played through Ancient Times I though more and more that I'd like a milked game on this map. I finalized that decision early in the Middle Ages. So I'd want rapid domination of the other Civs but not at any cost - I'd also want to work on improving territory as I went.
In the early part of the Middle Ages I continued peaceful growth. I spent the rest of it taking over Spain, then France, and then the Inca, almost finishing them off before the Middle Ages came to an end.
Exploring The World
My second city, Rotterdam, began building curraghs in 2430BC. By the end of the Ancient Age in 590BC I'd met Spain, France, Inca, England, Egypt, Zulu, and Maya, in that order. I'd stopped exploring by this date - I was in Republic and had more units than were freely supported, so soon after meeting my last rival I disbanded curraghs to reduce maintenance costs. My world map looked like this:
I'd discovered seven small islands by this date. I'd already claimed two, the ones south of the homeland with horses and iron. I had four galleys en route to other ones at this date. The green circles in the image above show the five islands I ended up claiming; the red circles show the two that England and Zululand got.
Unfortunately those two are both one-tile islands so they'll be difficult to take if I want them. I made my five islands safe over time by blocking all tiles where other Civs might land.
Early Middle Ages Expansion
I had one barbarian camp in the tundra spew out an uprising but I had enough swordsmen in the area that it was easy to control them.
I researched Engineering in 8 turns, then Monotheism in 6. One turn after that (290BC) two of my rivals had Feudalism and I traded for it. I then began researching Chivalry slowly, building some Horsemen and saving gold to upgrade them later. With just one luxury I was running 30% on the luxury slider at this point to keep all citizens productive.
During this peaceful time England was researching rapidly. She'd built Colossus and must have entered a Golden Age, boosting her research speed. In 130BC England learned Invention and I traded for it.
In 70BC I completed my Forbidden Palace, boosting production a bit. (I sure miss the powerhouse pre-Conquests Forbidden Palace.)
In 50BC I learned Chivalry. I immediately upgraded the 10 Horsemen I'd built so far and made final preparations for war.
During this phase of the game I didn't settle the home tundra region. I made one attempt to claim part of it but it was feeble and turned out to be too late. So my rivals filled it in. At 50BC my tundra region looked like this:
I wasn't concerned about it. The land bridge was easy to defend, towns in the tundra would be unproductive, and I could easily take them from my rivals later on.
I had by this time filled in a few more towns and packed as many as I could onto my island holdings. As a result I was hovering around the limit of free units at this point. I had 36 units in 50BC and was allowed 37 free ones.
Invading Spain
Going for a histographic victory I'll want to eventually eliminate all rivals but one and leave that one with just one useless town. This approach simplifies the milking phase of the game (no competition to worry about), gains control of all the luxuries in the world, and allows one to settle the best 66% of the world.
Spain was an easy choice for my first war of acquisition. She had three luxuries and could be reached with a single galley hop. After Spain a simple path north could lead through France and Inca and end in England.
I'd maintained enough cultural growth, mainly via libraries (8 at this date) that I would try holding all cities instead of razing them. I'd probably get a few flips but not many - I was about even in culture with the leading AIs at this date.
In 50BC my military advisor informed me that my military was strong compared with Spain. So even though 10 Knights didn't seem like much I decided to invade. I organized my troops and ships, built a few Swiss Mercenaries, then declared war on Spain in 10AD. My first troops landed that turn - 6 Knights and 2 Swiss Mercenaries.
On the next turn one of my Swiss Mercenaries won a fight and I entered a Golden Age. Most of my production was Knights at this time.
I continued research while fighting Spain, learning Theology in 5 turns, Education in 4, and Astronomy in 4. This allowed me to establish a trade connection with my new holdings in Spain at 210AD to gain a second luxury, ivory. England had continued her high research pace and I was able to trade for Gunpowder.
By this time, 210AD, I'd reduced Spain to 3 towns and despite some losses my military was up to 18 Knights.
It looked like saltpeter might be a problem. The nearest source I could see was in England. I decided to continue maximum research nonetheless, but perhaps not to Military Tradition first.
In 250AD Spain was down to two size one towns. I razed both and Spain was out of the game:
Invading France
In 270AD I declared war on France and moved into her territory. At this date I also connected incense in the ex-Spanish territory, bringing me up to three luxuries.
In 280AD I took a source of dyes from France and in 290AD connected spices in ex-Spain, bringing the total to a nice five luxuries.
At 320AD I'd taken over all of France except one town northeast of the Inca:
During the invasion on France I continued research, learning Metallurgy and Chemistry in 4 turns each.
Invading Inca
I declared war on the Inca in 330AD and began invading them. My forces were up to 28 Knights at this point.
My leader luck hadn't been great but in 340AD I finally did get my first one. He immediately formed an army of course. A second leader appeared soon after, in 390AD.
The Inca had built many wonders. I took The Great Lighthouse, Leonardo's, Sun Tzu's, the Hanging Gardens, and Knights Templar from them.
I continued research throughout my invasion of Inca. Military Tradition wasn't a priority because I didn't have saltpeter. So I learned Physics and Magnetism first because I hoped to trade with the distant Civs. No luck, perhaps they didn't have harbors yet. After that I learned Military Tradition (to build a Military Academy) and then Theory of Gravity. I learned each of those techs in four turns and traded for Banking along the way, finishing the Middle Ages in 470AD.
At 470AD the Inca were nearly out of the game and my world map looked like this:
It had taken some slugging to defeat the Inca and my forces were still at 28 Knights, production having exactly offset losses during this war.