Dungeons and Dragons (D&D) has been around for a while, but the Dragonlance setting has been around almost as long, first appearing in 1984 with the release of the Dragonlance Chronicles.
Dragonlance takes place in the world of Krynn, and it's a complex setting with a rich and storied history. Many things have taken place here over the years, but Krynn is a big planet - the stories of Dragonlance: Shadow of the Dragon Queen happen in tandem with other stories from elsewhere in the universe.
The timeline is vague by design, meaning that DMs and Players familiar with the setting are free to place it as they see fit, with a few minor constraints set by the story.
