Unbelieveable, I won!!
My first try on Deity turned out to be VICTORY!!
And it is a victory by Space Race, I would never imagine I can keep up with the computers in the modern time even though I had such a luck on Great Library.
Last time I stopped by 310 AD when I got to industrial, but still a small and poor country, I will start here.
Looking around I know that I would never be able to wage another war now. Although I had 15+ MWs which can be upgraded to Cavs 'theoretically', I have neither the money nor saltpeter to upgrade even one of them. When I set science percentage to 0%, I could get only 40 gold per turn(how miserable I am!).
The world is not peaceful, war is a constant threat to everybody. Most wars are fought between a Western(Rome, Japan, England) and an Eastern(Germany, Persia, Egypt) country, as the AI was stupid enough, they always take the land route and walk all the way through my territory.

Hence a constant sight in my country was an Egyptian force of 15 units faces a Roman force of 15 units and they just fight beside the Iroquois city Oil Springs!

As I didn't have any ROP agreements with any of them, these armies took a really long time to traverse Iroquois land, I guess this slowed down the AIs' steps greatly, and that might be the reason I was able to win.
Back to Salamanca. Before 800 AD I was busy developing my economy and population, the science percentage was always 0% and the money was used to hurry granarys and harbors. The AI distorted several times for money and territory map, they got satisfied, so no one punished me, that was great since my defensive force consisted of only spearmen, I haven't got any Iron or Saltpeter or Nationalism.
At about 800 AD I decided that I have to start to catch up. In the 450 years before the AI didn't developed too many technologies, and during the course England and Egypt was lagged behind. So through some clever trading and diligent researching I was able to make the gap smaller. In late industrial the Germans became the target of mighty Persians and Romans and also falled behind, so I managed to get Atomic Theory, Electronics and Motorized Trans from them, researched Radio I became the fifth to come to the modern age.
The Germans at this time was unable to keep the Persians outside their borders and several German cities were destroyed. Their capital, Berlin, got many good wonders. Namely, Pyramids, Smith, and Bach. Eager to have those, I signed a ROP with the Germans and soon declared war after getting my tanks next to Berlin. Every civ immediately turned 'Gracious' to me in the sight of my 'righteous' invasion to the 'evil' Germany.

While I got the real profit from this war when my forces captured Berlin just that turn.
The Germans was soon extinguished along with the poor Russians. Now Persia made a choice that made me win. They started an attack at the Romans!

With Japanese and English soon joined the force, Rome didn't even bother to start a vote when they built the UN. Hence I got time to research those Spaceship-related techs. The three most advanced civ(Rome, Persia, Japan) dragged in a World War, they could not match me in research. At last, when their Modern Armors were firing at each other, the Iroquois Ship launched, to their biggest dismay.
