Why were new medical treatments and inventions developed during world war i?

The World War I was a time of a lot of injuries - and many of them similar to each other. This gave a lot of opportunities to try out treatment- and see what led to a higher survival rate of the soldiers. If some treatment led to more saved lives- the doctors knew it worked (outside of war time they would need to wait long till they can try it out).

Sasuke was obssed by naruto being powerful so he wants to be more powerful. and at killed hi own brother and became rouge ninja