I think that everything that's been posted here thus far is accurate. Marines, I know, still have the standards that utilities are only for work and field wear and that you aren't allowed to wear them out among the general public. The Army takes a much different view on uniforms. We want our soldiers to be seen out in public to tell the "Army story" and to humanize our Soldiers...they are American citizens just like any other person. ACUs are our standard duty uniform. We've all but cast aside our Class B, Class A, and Dress uniforms except for the one or two times per year that we wear them for an inspection or formal function. Some units / installations wear class As or class Bs the first friday of the month for "payday activities" still, but that tradition is another one that continues to get less and less commonplace. The one that really agitates me is the fact that we no longer even go to the trouble of putting on our Class A uniform for memorial services...apparently soldier deaths have become so common now that they no longer warrant the trouble of putting on your class A uniform...so we just attend in our standard duty uniform...the ACU. I know that the standard duty uniform in DC / the Pentagon used to be Class Bs at a minimum...and frequently class As. I haven't worked there, but I think that they have even transitioned to ACUs for daily wear.