Ovbjective: Extraction? Assault?

So is Extraction just territories?

Has Assault really been left out?

What are all the objective game types Halo 4 will ship with?

Extraction is not like territories you can go to youtube and see this gametype.

Assault is not launching with halo 4.

Objective gametypes include: CTF,oddball,koth,and extraction; as well as, dominion, grifball, and flood.

Seems very similar to me.