Tyr, Loken and a timeline.

Hey everyone

Could anyone shed some light onto the timeline of events that cover Loken's corruption, his defection, Tyr's fall, and Tyr's burial?

I played through WotLK but my memory of events is fuzzy and preventing me from conceptualizing a time frame of these events.

Everything we discovered in Ulduar had a covert air (the patch was called Secrets of Ulduar, after all), but then, reading up on the lore of Tyr - and his involvement, in say, Dawn of the Aspects - makes it seem like lots of people knew about Tyr.

TLDR - When does everything happen?

I checked Wowpedia and while it clearly presents the events, it is vaguer on the timeline of these events.

Thanks!