The truce should actually include Thurii as well. Fixed.
Ok, good to know.
Still, replace Thurii with a hypothetical ally we make in the next 10 years. How would it play out? Could we aid them against Taras if we didn't start the fight? I'm just really curious how it would play out, what the strictures of the peace actually are.
I get the impression this is basically an ultimatum from Metapontion with the tacit support of the rest of Italia.
Essentially yes, although they're not really in as strong a position as it first appears. There are four cities involved in this (ignoring our ally Thurii who would fight on if we promised them Herakleia Lukania), Metapontion, Krotone, Rhegion and Lokri Epixephyrii.
Now Rhegion is somewhat friendly with us as we fought alongside them in the past and we're both aligned against Syrakousai. Krotone and Lokri Epixephyrii are on the other side of that, they're aligned with Syrakousai, but aren't exactly friends.
Now Metapontion would probably intervene on Taras' side to preserve the balance of power, but they would only intervene to stop us winning, not to see us lose. Rhegion could potentially be bought off due to the historical ties of friendship we have. Krotone and Lokri Epixephyrii are in a difficult situation, if they march north to fight us they expose Syrakousai right at the moment it looks like conflict might break out with the Sikeliote League. And if the Sikeliote League emerges victorious they lose a huge ally and leave themselves increasingly isolated.
I'm still not sure on the best move though. A better peace is obviously desirable, but do we trust our X
enoparakletor to buy off Rhegion? Can Syrakousai convince their allies not to go to war and leave them exposed?
It's a difficult decision.