Were the rest of the Imperials (Stormtroopers, etc) in on Vader's plan?

Question

In Star Wars: A New Hope, Vader first tells Tarkin to not worry about Leia and Obi-Wan escaping, as Obi-Wan has no intentions of escaping. (Though, Obi-Wan's intention of not escaping doesn't mean Leia didn't intend to.)

From the script

TARKIN

The princess! Put all sections on alert!

VADER

Obi-Wan is here. The Force is with him.

TARKIN

If you're right, he must not be allowed to escape.

VADER

Escape is not his plan. I must face him alone.

Of course,

Vader cuts down Obi-Wan

Leia and the rest of the crew escape aboard the Millenium Falcon. Vader and Tarkin discuss the fact that their escape was allowed by Vader/Tarkin.

TARKIN

Are they away?

VADER

They have just made the jump into hyperspace.

TARKIN

You're sure the homing beacon is secure aboard their ship? I'm taking an awful risk, Vader. This had better work.

Leia is a sharp one, though. She knows what's up.

HAN

Not a bad bit of rescuing, huh? You know, sometimes I even amaze myself.

LEIA

That doesn't sound too hard. Besides, they let us go. It's the only explanation for the ease of our escape.

HAN

Easy... you call that easy?

LEIA

Their tracking us!

HAN

Not this ship, sister.

---

A number of (expendable) Imperial Stormtroopers were lost during the escape, along with some Tie Fighters. Were the military personnel involved aware of Vader/Tarkin's plan to allow the escape (thus, partially explaining the horrible aim of the Stormtroopers and pilots), or did Vader/Tarkin just intentionally not send enough resources to properly give chase?

Answer 1

It's fairly safe to assume a few things from the dialogue and an understanding of how the Imperial forces operate:

• Based on the dialogue, it was Vader's idea to let them escape.
• Tarkin is not entirely comfortable allowing a high-profile prisoner like Leia escape (with the plans, no less) but Vader convinced him that they could track the Falcon back to the hidden Rebel base and then destroy it.
• Knowledge of the plan was probably highly compartmentalized, with only Vader, Tarkin, and a few key officers aware of the plan.
• It's extremely likely that guards & patrols were pulled from key areas in order to ensure a successful escape.
• Imperial troopers, and even junior officers, are trained to obey without question. Even if the re-assignment of troops & resources was odd, very few if any would suspect anything.
• Neither Vader nor Tarkin would think twice about sacrificing men & equipment to find the Rebel base.

Answer 2

It's entirely possible that their ability to escape to the Falcon was not part of the plan at all.

If you'll recall from the dialogue you yourself shared, Tarkin and Vader were caught unaware by the intruders, and Leia's escape was likely a surprise to them.

What WAS planned was the inexcusably small attack force they sent after the ship. Seriously - four Tie-fighters for an extremely high-profile target?

So while their escape aboard the death star may not have been orchestrated, once they were off the station, and therefore interrogating Leia was no longer an option, that may have been when Vader made the decision to let them go, having one of the TIE fighters attach a homing beacon to the ship (Or even knowing they had planted one on it while it was in the hangar).

It's difficult to know exactly when they would have coordinated this plan, but given Vader was preoccupied with Obi-Wan until just before the Falcon escaped, it seems likely that the plan came into formation after the rebels had gotten onto the Falcon and off the station, rather than before.

Answer 3

Tarkin is fail as commander of a space station populated by 30 million people. Only four "sentry ships" available to converge at any given point along your entire defensive grid? (you really gonna use tie fighters for that?) Where are all the orbiting support ships in defensive position? Who left the dock door open? Who hired TK421? One or more of the following is true:

1. Imperial protocol for space dock procedures needs work.
2. Orders were given not to open fire/permission never granted.
3. Only Vader and Tarkin need be aware of the ruse.
4. The homing beacon instillation crew had their guesses.
5. Intentional or not, interception was not possible as no capable ships were in orbit. With the tractor beam out of commission they could let them go or blow 'em up just outside the dock. Any ships launched in response would be to late. Once out of range of the deck guns and a few TIE noobs later, your in the clear.
6. The "awful risk here" is bringing aboard a vessel containing unknown quantities. The USS Cole incident isn't going to be for a very long, long time.
7. They did send enough resources; the death star. To your house. Ding-dong.

Answer 4

I think Tarkin sent less and may have told the men who he sent not to try that hard.