MARCH MADNESS, when did the march madness start?

Question

Can someone explain to me how does the NCAA tournament start? Did it start? When it started? And can someone explain how to be in the tourney, and how you get in (like what seed to play and what divisions play what)?
Explain everything you can think of.
10 points is for the person who explains the most
I'm ok if the answer is long.

Answer 1

1939 and oregon was the winner of the first tourney. they will win it all this year too.