What about spears to hold the captured towns? Do you figure on not using catapults either?
If you are defending, you are doing something wrong... (Seems like justanick and me both like that expression...

)
No, seriously, I will probably bring 2-3 pikes for defending my MI stack against counter-attacks, but that's all. Artillery type units (Trebuchets in this case) are necessary only when up against stronger units. In this case, however, India does not yet have Feudalism, so spearmen is the best I will encounter. So better to lose an MI once in a while than delaying the campaign by first building a sufficient number of Trebs, which also eat a big hole into your pocket. If I were up against musketmen by this time, I would include half a dozen Trebs in my stack, but as it is, I just go with MIs. They'll slice through India like a hot knife through butter.
Do you know a sure way of making India declare war on you? It seems to make a big difference to the people.
There are two ways I know of, but neither one is 100% sure and neither one seems to be applicable here (or at least not sensible to do):
- Trap a unit of theirs inside your borders, then make them furious by repeatedly asking for tribute (towns and stuff) and then ask them to "leave or declare". In 99% of the cases they will declare. But if your military is too strong compared to them, they will simply leave...
I currently have a RoP with India, so that won't work. (Don't know off the top of my head when it will expire. If it does before I'm done with the preparations, I might try it.)
- Declare war against somebody else (X). Then renegotiate the peace deal with India and add a military alliance against X to that peace deal. Wait, and if you are lucky, India will sign peace with X, before the 20 turns are up. So the break the deal, which at the same time also breaks the peace treaty, putting you in a state of war with them and providing war happiness. (Details are explained under "MAPT deals" in the strategy forum.)
This is neither reliable nor predictable, so I won't use it here. It is mainly used in space race games as a means for fishing for war happiness in order to speed up research, but not necessarily in military games.
Another question, Lanzelot, if you don't mind. Assuming you play on (I appreciate you may not be interested) would you divide your army or send it forward in one great, irresistible lump? Also, do you check to see whether India is building/has built any wonders and, if so, prioritise your attack accordingly?
It just occurs to me that the timing of setting up an embassy might be usefully co-ordinated with an invasion, in order to get that one turn look at what is being built in the capital to see whether it's a GW and, if so, how many turns before completion because it might be worth delaying until it's finished. A good plan might be to place embassies in Civ's that share a frontier with the target Civ in order to bribe them into joining in so as to weaken the target further.
I would probably devide the army into two columns of 10+ MIs guarded by 2 pikes. Embassies are not needed for checking for wonders: just open F7...

Here we see, that India has nothing useful.
But anyway: I already have embassies with every known nation... Opening an embassy and signing a RoP makes them polite and reduces the risk of an attack. And as I didn't want to get involved in any wars, and since I had enough cash lying around, I made these embassies and RoPs long ago and always renewed them. (Worked ok so far: even though there were already quite a few wars going on among them and despite my army consisting only of warriors for quite some time, I have never been attacked.)
In the turn before the attack I will gift them Republic. Then they will spend the first 3-5 turns of the war in anarchy and will neither be able to pop-rush defenders nor produce them...

And yes, signing up Rome and perhaps Byzanz against them is a good idea. The tech lead can be used for bribing them. This serves two purposes: a) it weakens India's army even more and b) it prevents them from signing up Rome against me...