When is the release date of Halo Wars?

[PokemonPlatinumFan]

I have heard multiple release dates for this game, but I am not sure which one is right. I need to know the actual release date of Halo Wars in the United States of America, and not anywhere else! Also, let me know what website link you got your answer information from!
Don't tell me just to Google the release date Matt1991, that is such a retarded answer!
I meant MattJ1991, sorry!

 

[Pratyush H]

1/11/2010
google.com

 

[kleighs mommy]

march 3,2009

 

[MattJ1991]

just google it...