It was the successor of the Doctrine of the Dyad. I count at least eight Sith Masters who obeyed the Rule of Two, possibly a few more. The Rule of Two was a decree for the Sith established by Sith Lord Darth Bane so they can operate in secret and eventually get revenge on the Jedi Order for their near extinction in the Jedi-Sith War. Note: I don't consider Sith Lords before Bane or after Sidious because those Sith Lords do not belong to Bane's order and thus would not follow the Rule of Two anyway. He had a vast number of apprentices, and some at the same time (e.g. Plagueis: yes, one apprentice (Sidious).Tenebrous: no, at least two apprentices (Plagueis and Venamis).Gean: yes, only one apprentice but unnamed.We don't know of any of his apprentice(s). Unidentified male Devaronian Sith Master: unknown.We only know of one apprentice, but we know so little about him that it's possible he didn't strictly obey the Rule of Two. Unidentified male humanoid Sith Master: probably.Millennial was a heretic who explicitly rejected the Rule of Two.

Cognus: yes, one apprentice (Millennial).

Zannah (Bane's apprentice, only named in Legends): yes, one apprentice (Cognus).

Legendsįrom Wookieepedia's list of Sith Lords from the Order of the Sith Lords (Bane's order), the following Sith Masters are known: Of the known Sith Lords, at least three of them followed the Rule of Two. He had multiple apprentices (Maul, Tyranus, and Vader) but he only had one at a time. We only know of one apprentice (Sidious) but there could be others we don't know about. Canonįrom Wookieepedia's list of Sith Lords, the following Sith Masters are known in canon: This means the claim that 'precious few' Sith Lords obeyed it can still be true if most of the unknown Sith Lords disobeyed it. We can only consider the few known Sith Masters, so we will underestimate the number of Sith Masters who obeyed the Rule of Two as well as the number who disobeyed it.

Bane's Order spans about a thousand years and most of the Sith Masters are unknown.

Bane the rule of two