Eastern Plaguelands is a level 40-45 zone.  (Source [Feedback] Eastern Plaguelands)

Breadcrumbs originate from Western Plaguelands.

Please list level started and level ended along with any other pertinent information (heirlooms, etc...).

Silverpine Forest is a level 10-20 Horde zone. (Source [Feedback] Silverpine Forest)

Breadcrumbs start at level 9 from Brill.

Please keep all feedback/commentary to this thread. List level that you started and level that you ended along with pertinent info such as heirlooms, guild perks, etc...