To the OP - I find warfare all about timing. I don't understand the advice given so far by other posters. It might work on easy difficulty levels, but on the higher difficulty levels you can't "build up your economy first" before war...the AI will simply get way ahead of you. You also can't sit there and build the perfect little army for yourself. It's all about speed. Have you ever played a RTS game like Warcraft? Half the game is timing/speed. There is a similar dynamic here in Civ. There are so many different windows of opportunity to attack that occur throughout the game, like if you are the first one to cannons and grenadiers...so I can't go through all of them. But you mentioned Rome. Okay. One window of opportunity to wage war in this game is VERY VERY early in the game. Why? Because swordsmen beat fortified archers, and axemen are nearly as good. If you don't hit the enemy fast enough, you'll have to wait until you get seige weapons, like catapults, but there is a brief window of opportunity in the very early game to hit your enemy before they have a real defence. It's actually a little tough to do this with Rome, because researching iron working, finding the iron, hooking it up, and then building praets actually takes a really long time. If you want to try an easier version of the same thing, try Persia's immortals. Just research animal husbandry first, hook up the horses, build 2 cities, and then pump immortals. Don't stop building immortals until you are done destroying your enemy, and then sometimes you can even go on and destroy a second enemy. This is all occurring in the classic age window of opportunity. Now, about Rome. Rome's praets are incredibly strong, but in my opinion actually difficult to use properly because they might come so late that you need to bring along catapults. IMO that's not using them properly. You should rush STRAIGHT to iron working, make hooking up the iron your number one priority and focus on building the praets. Nothing else matters at that point. Build 2 or 3 good production cities (one to claim the iron) and then go attack. You can't stop to build infrastructure (except maybe barracks) and certainly don't dream of building wonders or more cities. If you want to build wonders in the early game, don't play Rome, besides, you can just take them from other civs anyway. So it's all about timing. You have to get those praets out as fast as you possibly can, then they will work wonders. Don't build too many cities because you can just take some of the ones you invade anyway - especially the captital. Hope that helps
So wrong in aso many ways
A. Augustus is Industrious so wonders are an option.
B. You say that the early window of opportunity in the very very early game (axe rush) is difficult to do with Rome. Ummmm, Rome starts with mining which makes it one step closer to axemen than civs without it. You are allowed to build axemen if you are Rome.
C. If you have Prats you really don't need that many cats. So while you research construction you build prats if you will be facing a lot of protective units on hills behind walls.
D. you say you cannot take the time to build your economy first. That if you do, then you can not catch the AI. Does this mean that if you do not start with copper or horses then you can not win the game? Or that isolated starts are impossible to win because you can't go to war?
E. You mentioned that one of the windows of opportunity is with swordsmen but then you turn right around and say it takes a really long time to research iron working.
F. you say don't build many cities, but rather go take them from the AI. One settler and a couple defensive units cost a lot less to build than an army of invasion. And the end result is the same, you have the same number of cities but by building them you have them sooner.
G. And it may take a bit longer to get the iron hooked up but once you do, Prats are the dominant force with no reliable counter until machinery if the opponent does not have ivory...which takes a whole lot longer to tech. If you have cats and Prats you can take over two or three civs with nice cities and improved tiles ready to be worked. But you need the economy to support them.
H. Immortals are great if the enemy doesn't have copper. In BtS the Ai builds troops to match what you build. And if you go the Immortal route and don't have horses nearby then you have to back track and start up the bW-->IW tech path....and your window is gone. If you start as rome and don't find iron then you still have a chance that you found copper for axes. Plus BW opens up slavery to whip that early army.
I do not play the "Easy" levels and am not a warmonger by any means in the early game and have found that economy first is a sound strategy idependant of having offensive resourses available very early. I only gear for war from the onset if I have one of the lunatics as a neighbor or the AI starts so close that there is not enough room for early peaceful expansion.
CIV is NOT a RTS game like warccraft, it is more involved with many more diverse elements affecting gameplay. And should not be played with a RTS frame of mind. Especially on larger maps. Larger maps require you to build your economy. Because your neighbors are usually farther away. If you go conquer them at the beginning and keep cities the mainanance will cripple you. If you raze the cities then the other AI will settle there because they have the economy to support the cities, while you are behind in tech because you spent your tiome and gold on a war.