is the AI cheating

[Taqwus]

The AI is quite willing to let its hordes starve. *shrug* Depending on what you're playing, it's likely that you shouldn't be very often.

In my experience, they're also often quite willing to remain at peace with you for many years if you maintain strength on the frontier and you refrain from attacks on them -- and meeting engagements in what was independent territory (when you gave the movement orders) don't count. If you're not ready for multiple wars on multiple fronts, don't start them.