I managed to complete the Scourge Campaign and I have started the Orc campaign. Also, I am trying to do all the campaigns in exact order I decided to play the bonus campaign of The Frozen Throne before starting the Orc campaign of Reign of Chaos. Currently, I’m doing the mission where the Orcs kill Cenarius. I did not try it yet, but I don’t think it will be hard, since the entire game seems much easier than the first time I played it.