I don't think so. Is there a way to check? I also installed the chasing grim reaper campaign, the broken arrow campaign, and some single playing missions, but I don't remember putting any addons on.
I went thru my "downloads" folder, and looked at every campaign or mission i saw and none but black lands has a "addons" folder inside.
Thank you very much for making black lands, its the best campaign i have played. It is very detailed- every mission starts off with a small task, but then lots of action happens :)