How does Kakashi get sharingan?

well, when kakashi just became jonin him and his team mates and his teacher(the 4th hokage, minato, yellow flash...) went on a mission,he was with Obito (Uchiha) and another friend. kakashi was in charge of the mission, during the mission the enemy cut Kakashi (with a sWord) on his left eye. Later the enemy created a cave in. Kakashi got hit on the head by a rock as he was running out of the cave. His friend Obito saved him, throwing him out the cave... only he risked his life, a giant boulder half crushing his body.Realizing he was the only one who didnt give Kakashi a present for becoming a Jounin, he asked a medical team mate to take out the eye that was not crashed and give it to kakashi, and so she(medical ninja) did. and that's how kakashi got sharingan... and for those who think I'm wrong, I'M NOT, I WATCHED THE EPISODE OF IT!!!

So that's how kakashi got the sharingan! :D

look 4 naruto shippuden episode 119, and 120 Kakashi kronicles part 1 and 2 ~ a boys life on the battle feild part 1 and 2