After I liberated a CS(forgot the name but if you go to the saved game it is in the west of the continent containing Germany) from the Aztecs (and with that destroying them) I was at war with the liberated CS but in the option for the CS I could not make peace but only declare war against the CS.
After declaring war I was hit with a massive warmonger penalty with all civs but my ally. After 10 turns I could finally make peace and eliminate the war weariness.
After declaring war I was hit with a massive warmonger penalty with all civs but my ally. After 10 turns I could finally make peace and eliminate the war weariness.