The phrase was used by King Theoden in the Lord of the Rings movie "The Two Towers" right before the major battle at Helms Deep. The phrase can be used to signify the start of a major or significant event.
1:A saying started on AR15.com, that is used
anytime something bad happens or may happen.
2: Used by post whores for no good reason other than to annoy people.
Poster 1:I've ran out of tinfoil, the cops shot my dog and the Democrats are coming for my guns.
P1: damn, that music in belle's video slaps, i wonder what its called
P2: aight mate ima shazam it for you rq, apparently its called "And So It Begins" by Artificial.music