The term 'So THAT Happened' is a phrase used to describe an event THAT has already occurred and is now in the past. It is often used to express disbelief or surprise at the outcome of a situation. The crossword solution for this term is 'THAT', which is a four-letter word meaning 'in order THAT'. This phrase is often used to explain why something happened, as in 'So THAT Happened, in order THAT something else could happen.'