Wow, what a development... 
My 2 cents (I think some of it has already been mentioned):
Han:
Han is already willing to capitulate, but won't give us any interesting tech.
Charles:
Ulm is defended by only (three) riflemen - and it seems that a major part of his navy is parked there. I doubt that Charles has many machine guns already. Thus, we should throw our main army against him asap. I am not sure, though, whether we should go for the right side of his continent. It might take too long to ship our troops from Han's (former) main cities around the mountain to Charles right side. Moreover, if Aachen falls Charles might be more willing to sign peace.
We will probably lose Etowah.
Btw., if we turn on "avoid growth" Etowah will stay at 1. Wouldn't a successful attack by Charles detroy this city then?
Nagoya we might be able to hold if Charles moves his cavalry and cannon together.
The islands we took from SB we should try to defend with our navy - actually there is not much around we can use...
We have some frigates down south (west from Fort Ancient) that we could send up north. Although they might need too much time.
At Nanih Waiya (or whatever) we have three riflemen but NO Galleon - we should send 2 riflemen to the main island we took from SB or Mesa Verde. That way we should be able to hold these not so bad cities.
Just a (prob. useless) side note:
If Charles goes for combustion he will have to get oil from Pericles to build an advanced fleet - I can't see any oil close to his cities.
Edit: Just saw that our troops close to Hippo have already moved (so I deleted my comment above, because we will have to wait a turn with the capitulation).

My 2 cents (I think some of it has already been mentioned):
Han:
Han is already willing to capitulate, but won't give us any interesting tech.
Charles:
Ulm is defended by only (three) riflemen - and it seems that a major part of his navy is parked there. I doubt that Charles has many machine guns already. Thus, we should throw our main army against him asap. I am not sure, though, whether we should go for the right side of his continent. It might take too long to ship our troops from Han's (former) main cities around the mountain to Charles right side. Moreover, if Aachen falls Charles might be more willing to sign peace.
We will probably lose Etowah.

Nagoya we might be able to hold if Charles moves his cavalry and cannon together.
The islands we took from SB we should try to defend with our navy - actually there is not much around we can use...

At Nanih Waiya (or whatever) we have three riflemen but NO Galleon - we should send 2 riflemen to the main island we took from SB or Mesa Verde. That way we should be able to hold these not so bad cities.
Just a (prob. useless) side note:
If Charles goes for combustion he will have to get oil from Pericles to build an advanced fleet - I can't see any oil close to his cities.
Edit: Just saw that our troops close to Hippo have already moved (so I deleted my comment above, because we will have to wait a turn with the capitulation).
