system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Why doesn't Darth Vader order all TIE Fighter Squadrons to defend the Death Star at the end of A New Hope?

I know Grand Moff Tarkin didn't want to send them out because he believed that doing so would make the Empire look weak, but Vader has a high position than him. Vader certainly wasn't as ignorant of a rebel victory, as he even had his own personal squadron fight. Why doesn't Vader just overrule Tarkin's orders?
gpt
Because he wasn't allowed to.

While he was on the Death Star, he was under orders to obey Tarkin's every order as both humiliation and punishment. The Emperor had been displeased by Vader beforehand and temporarily stripped him of his normal command, while giving Tarkin a reputation boost by putting his second in command, the Dark Lord, under Tarkin's thumb.