I am not talking about nations with players that went inactive and were replaced by AIs. I am talking about AI countries that started out as AI,and are not playable by players. Sometimes,AI nations can expand quickly when a newbie declares war on them and does not devote enough forces to defeating it. I have seen this more than once; sometimes AI nations come out victorious,even though they had less troops and resources from start. Admittedly,it happend to me too,when I was a newbie myself. I would forget to move enough troops to defend a province.
Screenshots would be appreciated.