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Order Sixty-Six was implemented via a bio chip in each of the clone troopers. When activated, troopers would immediately perceive Jedis as a threat and kill them.

Since Anakin was a Jedi until around the time of the Order, how did the troopers know not to kill Anakin?

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Where does it say about the biochip? – AncientSwordRage Jan 9 at 20:29
Link added to source – Dancrumb Jan 9 at 20:34
That is misleading, as the order was given by holocomm, merely enforced by bio Chip. The chip was there to make sure the given order was carried out, not to give the order in The first place – The Fallen Jan 9 at 20:47
@SSumner - I don't remember details of how chip works, but it's not impossible that one of its effects was to affect the clone's perceptions to make them think Jedi are a threat. The Order never said "Jedi are a threat" over hologram, just said "execute order sixty-six" – DVK-in-exile Jan 9 at 21:14
DVK's answer is awesome, but even if the command was generic, the commanders could see in their HUD screen that Anakin was no longer a Jedi. – Evil Angel Jan 10 at 3:30

According to the film's script, the orders to kill Jedi were given individually, to each clone commander (and for obvious reasons, Chancellor Palpatine never issued that order to whoever Anakin's accompanying Clone commander was):


DARTH SlDIOUS: Commander Cody, the time has come. Execute Order Sixty-Six.
CLONE COMMANDER CODY: It will be done, My Lord.



CLONE COMMANDER BACARA (1138) exits a Gunship near the entrance to the city. He rallies his TROOPS to attack the city, then gets a message on his comlink. He stops and moves to one side as a HOLOGRAM OF DARTH SIDIOUS appears on the comlink in the palm of his hand. He moves further into the shadows.
DARTH SlDIOUS: Commander 1138 . . .
DARTH SlDIOUS: The time has come. Execute Order Sixty-Six.
CLONE COMMANDER BACARA: It will be done, My Lord.



DARTH SIDIOUS stands alone in his private office, illuminated only from a hologram projector beam from above. A small HOLOGRAM OF COMMANDER GREE stands in front of him.
DABTH SIDIOUS: The time has come. Execute Order Sixty-Six.
A vista of waterways, high green mesas, and giant tree cities serves as a backdrop for the fierce battle, CLONES AND WOOKIEES against TRADE FEDERATION DROID ARMIES, with treaded tank-like vehicles. CLONE COMMANDER GREE holds his comlink.
CLONE COMMANDER GREE: It will be done, My Lord.
CLONE COMMANDER GREE snaps his comlink shut.
YODA watches from the balcony.

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@DVK on a different note: how does this answer the question about how Anakin survived? – RedCaio Jan 9 at 21:14
@RedCaio - because for Anakin to have been killed, Palpatine would have to be idiotic enough to individually, purposefully contact the Clone commanding the 501st (IIRC that was Anakin's clone detachment), and tell him "Execute Order Sixty-Six" - which obviously never happened. I have not, in any part of canon, ever noticed old Sheev being that dumb. – DVK-in-exile Jan 9 at 21:18
"I have not, in any part of canon, ever noticed old Sheev being that dumb." Except when he decided to torture Luke to death without first saying "Hey, Luke's dad - leave the room for a minute. I want to be alone with Luke (so I can torture him to death without worrying about you throwing me off a ledge to my death because he's your son and he totally just refused to kill you, despite the fact that he probably knew I would kill him for it, which means he loves you and would rather die than kill you)". – Wad Cheber Jan 10 at 0:14
@WadCheber - oh god. I'm NOT going there to read. I'll trust if you see anything we didn't say you'll repost :) – DVK-in-exile Jan 10 at 1:08
@WadCheber = not sure i said it in an answer... but yes, Yeeeesh, find some hobo off the street next time or a 15 year old fanfic writer. Either would work out better! – DVK-in-exile Jan 10 at 3:48

Possibility #1: Anakin survived because, by the time Order 66 was issued, he wasn't a Jedi any more. He wasn't even Anakin any more. He was a Sith Lord named Darth Vader. Since Order 66 was "Kill all Jedi", and Vader wasn't a Jedi, the Order simply didn't apply to him.1

Here's how the Anakin/Vader change and the issuing of Order 66 plays out in the script - note that Anakin becomes the Sith Lord Vader just before the order is issued2:

ANAKIN kneels before PALPATINE.

ANAKIN: I pledge myself to your teachings. To the ways of the Sith.

PALPATINE: Good. Good. The Force is strong with you. A powerful Sith you will become. Henceforth, you shall be known as Darth . . . Vader.

ANAKIN: Thank you. my Master.

PALPATINE: Rise, Darth Vader.

Palpatine moves over to his desk.


YODA winces, closes his eyes, and holds his head. He feels a disturbance in the Force.


PALPATINE is putting on his dark cloak: he is now fully DARTH SIDIOUS.

PALPATINE: Because the Council did not trust you, my young apprentice, I believe you are the only Jedi with no knowledge of this plot. When the Jedi learn what has transpired here, they will kill us, along with all the Senators.

ANAKIN: I agree. The Jedi's next move will be against the Senate.

PALPATINE: Every single Jedi, including your friend Obi-Wan Kenobi, is now an enemy of the Republic. You understand that, don't you?

ANAKIN: I understand, Master.

PALPATINE: We must move quickly. The Jedi are relentless; if they are not all destroyed, it will be civil war without end. First, I want you to go to the Jedi Temple. We will catch them off balance. Do what must be done, Lord Vader. Do not hesitate. Show no mercy. Only then will you be strong enough with the dark side to save Padme.

ANAKIN: What about the other Jedi spread across the galaxy?

PALPATINE: Their betrayal will be dealt with. After you have killed all the Jedi in the Temple, go to the Mustafar system. Wipe out Viceroy Gunray and the other Separatist leaders. Once more, the Sith will rule the galaxy, and we shall have peace.


ANAKIN goes to the Jedi Temple with a battalion of Clone Troopers.


The battle between the CLONES and the DROIDS rages throughout the sinkhole. OBI-WAN rides up to CLONE COMMANDER CODY.

OBI-WAN: Commander, contact your troops. Tell them to move to the higher levels.


CLONE COMMANDER CODY starts to move away, then remembers something and returns to OBI-WAN.

CLONE COMMANDER CODY: (continuing) Oh, by the way, I think you'll be needing this.

He hands OBI-WAN his lightsaber, and the LIZARD rears up.

OBI-WAN: Thank you, Cody, (smiling) Now let's get a move on. We've got a battle to win here.


OBI-WAN and the LIZARD ride off down the wall of the giant sinkhole.
The battle rages throughout the city. CLONE COMMANDER CODY (2224,) takes out his comlink and listens to the HOLOGRAM OF DARTH SIDIOUS as, far below, OBI-WAN can been seen battling DROIDS on a landing platform.

DARTH SIDIOUS: Commander Cody, the time has come. Execute Order Sixty-Six.

CLONE COMMANDER CODY: It will be done, My Lord.

The HOLOGRAM disappears, and CLONE COMMANDER CODY gestures to a nearby Clone Trooper.


Possibility #2: Anakin survived because Order 66 only applied to Jedi who were accused of acting against the Republic:

According to this answer, the text of Order 66 was as follows:

Order 66: In the event of Jedi officers acting against the interests of the Republic, and after receiving specific orders verified as coming directly from the Supreme Commander (Chancellor), GAR commanders will remove those officers by lethal force, and command of the GAR will revert to the Supreme Commander (Chancellor) until a new command structure is established.

If Anakin wasn't accused of "acting against the interests of the Republic", he wouldn't be targeted. His actions at the Temple would certainly suggest that he was serving Palpatine (the head of the Republic Senate) and opposing the Jedi, so the clones may have accepted him as "loyal", whereas the other Jedi were seen as "traitors".

Note about the previous answer:

I think DVK's answer is good, but Star Wars Databank disproves it. The problem is with the claim that the troopers who accompanied Vader to the Temple hadn't received Order 66. Here are the facts:

  • Those troops were part of the 501st Legion, and were led by Commander Appo, who answered directly to Anakin Skywalker.

  • The 501st were ordered to accompany Anakin to the Temple and kill all the Jedi there.

  • When Anakin left after killing the younglings, and went to Mustafar, the 501st remained at the Temple.

  • They were guarding the Temple when Bail Organa arrived. Just after Organa's arrival, a Padawan appeared, and killed several clones and wounded Commander Appo, before the other clones managed to kill the Padawan.

  • The official Star Wars site's Databank has a video of the Padawan's emergence and death. It is called "Bail Witnesses Order 66".

  • The Padawan is named Zett Jukaska, and Star Wars Databank's entry on him confirms that his death was part of Order 66.

ZETT JUKASSA A young Padawan, Zett Jukassa fought heroically after clone troopers marched on the Jedi Temple to carry out Order 66. He fell in battle as a horrified Bail Organa looked on.

  • This implies that the troops with Anakin had received Order 66.

  • Star Wars Databank confirms that Anakin and the 501st attacked the Temple because they had received Order 66:

Anakin Skywalker discovered the terrible truth: The Sith Lord was Palpatine himself, the puppeteer behind both sides of a war engineered to weaken the Jedi and transform the Republic into a massive industrial and military war machine under his control. But in discovering Palpatine’s secret, Anakin also fell prey to his lures. He became the Sith apprentice Darth Vader and marched on the Jedi Temple as part of Order 66. The massacre in the Temple left the Jedi Order all but extinct, reduced to a handful of fugitives and hermits.

  • The only logical way to explain the fact that they received Order 66, but didn't kill Anakin, is to say that Order 66 didn't apply to Anakin, and the clones knew this. The most likely explanation of how they knew is, as my answer says, that they were told by Palpatine, or figured it out when Anakin started killing Jedi, or figured it out when Anakin accepted the order to kill Jedi.

However, we just don't know how the troops learned that Anakin was exempt - the more you dig into this question, the more confusing the information becomes.

1The mechanics by which the Clones distinguished Jedi from non-Jedi aren't made clear, but it doesn't matter much. Palpatine might have told the Clones Vader led to the temple that Vader wasn't a Jedi, and shouldn't be killed. Since the other Clones were scattered throughout the galaxy, Palpatine could inform the rest of the army about it at his leisure. This is assuming that the Clones couldn't distinguish a Jedi from a non-Jedi on their own. After all, if someone is hacking baby Jedi to pieces and taking orders from a guy who orders all the Jedi to be killed, that person is probably NOT a Jedi.

Really, the only clones who needed to know that Vader was no longer a Jedi ASAP were the ones he took to the temple before slaughtering the Younglings. These troops could have identified Vader as a non-Jedi by the fact that he was killing Jedi Younglings. If someone slaughters Younglings, he isn't a Jedi. Or they could identify him as a non-Jedi if Palpatine said "You men go to the Jedi Temple with Darth Vader and kill the Younglings". If someone is called "Darth", he's not a Jedi.

2All emphasis mine.

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How do stormtroopers know he isn't a Jedi anymore? – DVK-in-exile Jan 9 at 23:04
@DVK - see note 1. – Wad Cheber Jan 9 at 23:54
Sorry, then I don't see the point of your answer. You're depending on nebulous "Palpatine SOMEHOW told them not to" that isn't in canon, whereas my asnwer explicitly explains WHY and HOW he ensured that. Oh, and pretty much NOBODY knew that Emperor and Vader were Sith, BTW (among other sources: Tarkin) – DVK-in-exile Jan 9 at 23:57
Yes it does. The Order had to be given to individual commander. Once they killed "their" Jedi, they are done with the Order. Moreover, other than Anakin's commander (who my answer explains), no clone ever saw Anakin again - after destroying the Temple, he went to Mustafar ALONE, and then got Vaderized into a suit. – DVK-in-exile Jan 10 at 0:31
@DVK - SW DB describes Order 66 as "Order 66, which commanded the eradication of all Jedi and would leave him unopposed for galactic domination.". "ALL JEDI", not just each unit's CO. – Wad Cheber Jan 10 at 2:03

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