By successfully obtaining the goal of any operation, usually the team will be left with a certain sense of "family" through their accomplishment. However, I've known of some evolutions, in which the team wasn't successful, but they left with the same "family" spirit.
Ultimately, and if you paraphrase both posts by bossi and pbi, it comes down to Leadership, and the Principles of such. I'm sure you're aware of the 10 Principles of Leadership, and if not, let me know and I'll gladly post them.
In my opinion, you are already on the road to success, as you are obviously open to suggestions. Hopefully, fellow posters will offer you plenty of helpful ways in which to apply the Principles of Leadership, through some types of team building exercises.
Good Luck
CHIMO!