On a smaller scale, take our fire department for example.
In any leadership/incident command/fire officer type classes you take, they teach you alot of things. One of the things they teach you is basically, the art of mind fucking.
..insert movie quotes here..
Anyway, one of the things they teach you is to never take credit for shit. Especially in front of your people. And if the situation is unavoidable, you reflect as much of that back on your people no matter what. Even if they didn't do shit. Your people were the ones that made this accomplishment happen, not you. You avoid using "I" as much as possible, and pour on the "us" and "we". Using this approach with your people builds rapport in their minds, and it makes them more eager to work for you. It makes them want to follow you.
Like I said, the only two issues I really had with his speech was the way he seemingly patted his own back for half of the speech, and made our armed forces a footnote, or afterthought. We know you made some decisions. You're the Commander in Chief. We get it. No reason to tout that when you could just as easily say "Intelligence was presented to us in August, and through due diligence, that intelligence gave us the opportunity to find OBL, and carry out a successful mission today."