How? Sleep Deprivation?
How does sleep deprivation affect human beings?
Answer: If you are not strong enough it can have Effects on the brain. Which you can enjoy hallucinations. You can have blurred illusion. Headaches, weight loss or gain, effects on the healing process. You can enjoy nausea, Fatigue. You can have Confusion and tremors.
Imagine there is some empire that haven't slept for years and are still alive. I know how that feels. .
loss of Mental and physical control. That's it in a nutshell.
It's become very hard to concentrate, your muscles burn out at full tilt, your stamina is nil, your attention starts jumping all over the place.
As the deprivation continues, possible hallucinating kick in and your body begins inquiring for a way to "override" you and go to sleep.
It sucks. .
okay it cant be good
heres the wiki article for a better answer