Thanks Charis. It sounds like I'm likely to use aircraft more in PTW!
Radio towers and airfields both sound like good motivation. I suspect I still won't use them a lot though for a couple of reasons: 1) In many of my games I have overwhelming military superiority by the time aircraft are available, so tricky wars are over and brute force is all that is needed. 2) For fast targeted strikes which go deep into enemy territory it seemed to me (long time since I used them though) that it was difficult to keep aircraft near the front to participate in the assault. They fell behind with turns frequently wasted rebasing them. Airfields could help a lot in this regard.
Your road network destruction tip sounds good to me. I'm going to try it next chance which seems appropriate. It could be used to substantially reduce the number of defensive units which must travel with an army and/or to make a more aggressive assault possible.
My comments were indeed based on deity level. I'm probably a slow starter relative to most players. When possible I prefer to build up a fairly large force before going to war. Of course at deity it is never overwhelming at the start of a war but one can whittle the AI down...
All other things being equal (they never are
) I prefer to leave the first war until I have about 30 mounted units and have enough barracks towns to produce two or three more per turn. Two things in particular can change that preference:
1) If I don't have horses then my top priority is an early strike to obtain them. In this case I'll go to war much earlier, with no intent of dealing a severe blow to an opponent, with just the hope of taking some horses and not getting hit too hard in return.
2) If I don't have iron then I may or may not go to war early on to obtain it. It depends on whether I'm also horse-deprived and depends on the pace of tech (if I have horses and no iron then I won't go out of my way for iron until Chivalry is available.)
And circumstances in the game often change it too of course. Sometimes I begin with less than my preferred 30 units because the window of opportunity starts closing. Other times (it swings this way less often
) it seems appropriate to build up more. And of course sometimes war is thrust upon me...
When I first initiate a war my objective is usually Forbidden Palace - I want some land which will work reasonably well for FP and I want enough fighting to have good odds of a great leader to rush the FP.
A secondary objective is often a luxury or two - these are important enough to me to determine who I'll attack (when there's a choice) and the direction of the attack. Wonders are also sometimes secondary objectives - if I'm lucky enough to have a neighbor with a wonder I want then they become an early target.
And if I don't have iron but do have horses then iron is a crucial objective in my first horseman assault. This can motivate me to begin my first war sooner than I would prefer, and with a smaller stack, e.g. say 20 horsemen.
Depending on tech pace (and strength/position of neighbors, Golden Age triggers, resources, and just about everything else
) sometimes my first war is with horsemen, sometimes it waits until I have knights.
My first war often doesn't result in an overwhelming victory. In later wars I often try to devastate the opponent, continuing an assault until there's little left of the other Civ. But in the first war this isn't something I focus on. I start when I think I have enough strength to shoot for a clear win, taking out say 1/2 or more of the target Civ. If the war goes well I'll continue it. If it goes poorly I'll quit when I've reached my objectives, leaving the other Civ with some strength. I sometimes keep going longer than I'd prefer (even into a second Civ when necessary and possible) if I haven't produced a leader yet.