dumbledore asks Harry to come with him to destroy another Horcrux, signaling the beginning of the end.
Harry suspects Draco is trying to hurt dumbledore and seriously injures his rival with one of the Prince's spells.
dumbledore told them there were six remaining horcruxes at the end of the last movie.
Enter the Order of the Phoenix, a secret organization founded by dumbledore to fight Voldemort.
Umbridge discovers the group, ousts dumbledore, and is appointed the new headmaster.
1787, noted as a dialect word in Hampshire, Cornwall, etc. for "a bumblebee."