Inside the Washington Beltway are many. First, of course, is the President. Anytime any President faces problems or criticism at home he can start a war to take media attention away. Then there are the Congressmen getting much more media exposure as they debate the important matters of life or death. Then there's the media, watching ratings soar as readers and TV watchers hang on their every word.
TV is ideal for the misery of war, just as local news programs always stress murder, rape, and fire.
Of course, there's the defense establishment getting new appropriations, honor, new weapons systems, the chance for some excitement and the opportunity to try out their new technological marvels in real wars. One thing they, of course, don't have to worry about hardly at all is getting hurt, much less killed. Added to this is, of course, the old NATO bureaucracy, tens of thousands of high caliber men and women, looking for a new mission. Then there are the police and intelligence agencies. The FBI, CIA, ATF, etc.