Halo Wars will release in Japan and Asia on February 26th, in Europe on February 27th and North and South America have to wait till the Third of March

Pre-order the game at a participating retailer and you'll get an exclusive in-game Warthog with flame decals, whether you buy the Limited Edition or not. SHIIIIINNNYY.

For more info go check out this page on Eurogamer

Source: Eurogamer