Why and how did the Korean War come to an end in 1953?

Question

And why are there still two Koreas today?

Answer 1

It came to an end because of a stalemate. The tide had turned several times during the war and by 1953 the two side reached a stalemate.

Answer 2

It hasn't actually come to an end. A cease fire has been in place for the last 55 years, come July 27.