I've just finished a Monarch game as Liz. I won in 1930 with space race. For the first time ever, I was in the game with Cyrus bent on destruction. Normally, I find Cyrus to be quite peaceful. In this game too, I was good friends with him, but I was surprised at his warmongering. Capac had declared war on me early and I fended him off, and took a couple of cities from him before offering peace. Cyrus didn't come into this, but a short time later, I noticed an enourmous death stack of Cyrus on Capac's border. Sure enough, he attacked a few turns later, burning down every city he came accross. I declared on Capac and snapped up Cuzco from amid Cyrus' devastation. In the end he kept two Incan cities, but burned the rest, not stopping until the Incan civilisation was dead. Later in the game - in the middle ages - again the death stack rolled out of Persia, this time attacking Ceasar who was being quite a peaceful builder. This time he stopped short of wiping Caesar out, leaving Rome, and one other city on the other side of my empire from Cyrus, but this time he did not burning, keeping all cities he captured. I was amazed to see Cyrus playing llike this this. The first time I've seen it.