I'm about to finish my first campaign as the Entente and i'm in the middle of 1918. I haven't been able to send a peace proposal to Austria-Hungary. I know you can only do it once during the winter interphase and the manual says you need to have at least one Austro-Hungarian city to send a proposal, but the option is always grayed out; it says the conditions are not met. Can anyone tell me what those conditions are?