To illustrate the build units and conquer approach, I started a game as Peter. I will include some screenshots and details about the Ancient Era in this post. This game was set up as Immortal, Continents, standard size (not small which is default), and maximum CS. Everything else was left default. Here is what my start looks like. Spoiler : Pretty nice. My first worker will improve the rice, one stone, and create one pasture when the time comes. Plenty of tundra tiles to the south to get the bonus production and faith as well. Even with a hill, it takes 6 turns to build my first scout. Which is followed by a second. Spoiler : Look up there to the north. Looks like a nice spot for a 2nd city on the coast. On turn 12 I finish the 2nd scout and start building a slinger. Spoiler : 3 turns later I complete Code of Laws and go with Discipline (hunting barbs) and God King (need that early faith for a pantheon) for my early policies. Spoiler : On turn 23 I finish Astrology and start building my Lavra. As you can see, I have two slingers done already and also a worker (from a goodie hut IIRC). Spoiler : On turn 29 I finish Craftsmanship after the boost from my worker finishing the pasture. I change my military policy card to speed up production of units. Spoiler : I have also cleared a couple more barbarian camps and have enough gold to buy a setter. Spoiler : ...and on turn 35 I settle my 2nd city on the coast to the north. Spoiler : Divine Spark seems like a good choice for my pantheon. I might snag an early religion and also get some extra artistic great people later on. Spoiler : By turn 47 I have finished State Workforce and I change my policies. Conscription will save me cash from my growing military and Urban Planning will be useful for new cities to have the production boost (1 production is a big boost for a newly settled or conquered city). Spoiler : After moving my troops into position, it is time to DOW my first victim. Spoiler : By turn 51 I have managed to snag an early religion. Choral Music will help to get early social policies and Cathedrals have places for extra religious artwork. Spoiler : Turn 60. I have taken the Norwegian capital. Spoiler : For some reason, Harald only has two cities. I'm not sure if early barbarian activity slowed him down, or perhaps he didn't find the coast having started inland. He only has two cities (or should I say only one more) for me to take. At the end of the Ancient Era I have three cities, and I am about to capture a 4th and remove Harald from the game. I have Lavras in all three cities (Harald built one of them) and I am a few turns from finishing a Campus in my capital. During the Classical Era I will get Shrines and Temples in these Lavras to start cranking out more culture (from Choral Music) and faith to buy workers and settlers. Spoiler : Having earned a Golden Age, I choose Monumentality as my dedication to get settlers and workers with faith for expansion and development during the Classical Era. You might also note that I have already DOW Australia. This is for the benefit of having no war weariness as a Surprise War in the Ancient Era does not have the penalty that it will in the Classical Era.