While I'm at it, the byzantines and bulgarians were also at war in 1300 (war didn't officially break out until 1302, but the byzantines and bulgarians were in perpetual conflict up until this point, 1302 was just the point of a major battle), so were the byzantines and the ottomans. The Serbians and Bulgarians should also have very low relations, as Serbia intervened and went to war with them soon after the byzantines experienced defeat. Naples should have low relations with the Byzantines. Bulgaria should also be allied with the Golden Horde, as they actually fought alongside one another in campaigns against the Byzantines. The bulgarians were actually another tributary of the mongols, and even had a mongol ruler for a short time before he was overthrown. I think it also goes without saying that the mongols and byzantines should be at war, and the mongols should also have low relations with serbia. The Georgians were a client state of the Ilkhanate at the time also (although this could be represented as an alliance). The Ilkhanate and the Ottomans should also have low relations.