Chieftain's Breastplate

Dropped by 2

• Mith'rethis the Enchanter level 52 0.9% 8217
• Heavy War Golem level 49 0% 5854

Dropped by, from a shared table 40+

• Ancient of Wisdom level 59 62814
• Avranagos level 60 62832
• Barkskin Den Watcher level 62 61346
• Barkskin Ursa level 62 61342
• Barkskin Windtalker level 62 61347
• Blackhand Dreadweaver level 60 9817
• Blackhand Veteran level 60 9819
• Champion Coldmine Guard level 60 13536
• Champion Coldmine Surveyor level 60 13539
• Champion Irondeep Guard level 60 13554
• Champion Irondeep Raider level 60 13545
• Duskfang Creeper level 63 61935
• Elder Growlheart level 62 61348
• Firelord level 62 11668
• Gordok Warlock level 60 11448
• Hakkari Priest level 60 11830
• Hive'Ashi Drone level 58 13136
• Hive'Ashi Worker level 58 11721
• Infinite Rift-Lord level 62 65105
• Larnaea level 60 63034
• Lord Xanvarak level 63 61609
• Manascale Whelp level 60 59988
• Relentless Felguard level 62 61351
• Relentless Temptress level 61 61350
• Rivash the Deceiver level 58 63117
• Runic Construct level 61 60596
• Sanctum Dreamer level 62 60742
• Scholomance Handler level 60 11257
• Shadowbane Alpha level 63 61191
• Shrieking Banshee level 58 10463
• Skitterweb Crawler level 60 61206
• Skitterweb Venomfang level 62 61208
• Starcaller level 58 62830
• Temporal Dust level 61 61317
• Veteran Irondeep Raider level 59 13544
• Veteran Irondeep Surveyor level 59 13556
• Whispering Hydra level 59 63005
• Withermaw Shaman level 62 62871
• Xalthix level 61 61565
• Zafan level 60 61613

Only the first 40 are listed.

Found in 4

• Solid Chest 0.3% 153454
• Arena Treasure Chest 0.3% 179697
• Solid Chest 0.3% 153451
• Solid Chest 0.3% 153453

Contained in 1

• Mithril Lockbox level 2 0.4% 5758