Great story SirPleb & congratulations on what sounds like a solid game. Other than that, I've only read Zachriel's game so far - I haven't read anyone else's post here cause I'm not finished my game yet.
I'm in 320 AD & things are going pretty bad. I will likely not win this one so finishing is quite unlikely. It is my first Deity game ever & needless to say, the starting position was not helpful.
My 3 or 4 scouts did pretty good mapping out the west & gained maybe 3 or 4 techs (both the wheel & horseback riding real quick!). Then, of course, I had to scramble to get the horse, which I was able to do eventually. Shortly after hooking it up, Russia declared war on me & because one of their towns was in between my horse & capital, my trade was severed. Having mainly just built military units thus far, I had enough to raze their town to restore my road route, but because of some sort of bug, the horses were shown as "unconnected" for 3 turns before they were magically connected again. This put me off for the match & I don't think I mentally recovered from it.
I made a bad move switching to Monarchy during the Russia war, because my unit support was cut in half & I was paying over 20/turn for units! I disbanded my explorers & sold my granaries until later I just moved back to Desp, which is what I am in now, to pay for my army.
Short wars were my style up to now, taking 1 or 2 cities and then settling for peace for a handful of tech. I am currently researching Chemistry at 10% while the AI is past Nationalism. I had extended myself down to the gems but never could get past the AIs' superior units very much to really take out any more.
I have iron in the land just west of the capital, but no harbour there yet - I'm working on it. Of course, I have no saltpeter either. My poor spearmen

. I might get Nationalism before I get iron or saltpeter! Without iron though, my MWs just don't cut through fortified riflemen too well and my spearmen aren't much against cavalry. It is the first game I have the next resource before I hook up the previous one to use!
Since I am resource & tech challenged, I don't think I can do much - hence, continuing is in doubt, unless I just go for some survival strategy, which I may to play out the game, but I see little point.
Anyway, I learned:
- I should have used a military alliance or 2 to get the AIs to help me take out targetted civs. Russia kept barely overpowering me. 1 helper would have probably licked them for me.
- Watch the unit support before switching govts. I was lucky we were Religious this time!
- Taken a better look at hooking up iron earlier. My focus was somewhere else, I guess.
Good luck, and cry the name of your fallen comrade, "chiefpaco", when your warriors go to battle! Avenge my shameful attempt at a conquest!