Were it not for the past two years, during which Mission of Burma proved that one of the most ferocious and visionary bands of the punk era could return after a 20-year layoff with the same fervor that made it so scary good in the first place, ''The Obliterati" might feel like a surprise mortar attack from nowhere, and everywhere.
In some ways, ''The Obliterati" (out tomorrow on Matador) still feels, and sounds, like an ambush, despite what we all now know about Burma: that the Boston outfit's return was not only plausible but necessary, perhaps inevitable. As Burma made clear on 2004's cobweb-clearing ''ONoffON," the band had no interest in cashing in on the cheap nostalgia of a mythologized age and picking up a few quick checks along the way. Just like that, Burma was back, louder than bombs and sounding like no one else.