Orcs in Dragonlance
There is some controversy regarding orcs in the Dragonlance. The 1st edition AD&D Dragonlance Adventures hardbound rulebook states that orcs do not exist on Krynn, with ogres and minotaurs largely replacing their typical role. Second and 3rd edition Dragonlance supplements also remove orcs from the world of Krynn. The main confusion on the subject has occurred from a few Dragonlance novels and/or adventures in which the writer has accidentally included orcs. In particular, the novel Kendermore by Mary Kirchoff, where one of the main characters is a half-orc. This has occurred with other iconic races of Dungeons & Dragons, such as drow, that are not native to the Dragonlance setting. Some suggest that the presence of orcs in Dragonlance can be explained through planar or space travel as Krynn is connected to other Dungeons & Dragons worlds (where orcs exist) through the Planescape and Spelljammer settings.
Read more about this topic: Orc (Dungeons & Dragons), Orcs in Various Campaign Settings