Assassins in Guild Wars (not factions)

ok i havent gotten the expansion yet, i had quit for like a few months before it came out. but now im seeing assassins and stuff in normal GW storyline, once you buy Factions are you allowed to bring your characters back to normal GW?

sorry if this is a noob question but i missed everythin about factions while i was gone.

~*~Thanks~*~

Well if you see assassins in normal GW then yeah you've answered you're own question. So yeah you can. (Hope it doesn't come off as rude, not trying to be)

You can link chapter 1 and 2 together. Then travel via Lions Arch / Keinengs Centre to one and the other.