You may want to protest military activities, but the 1st Amendment doesn't allow you to do so on military installations. Courts have consistently held that the commander's need to maintain "good order and discipline" on post trumps some civilians desire to shoot his mouth off. You can stand outside the gate and do that, if you so desire.
As the last strains of "The Star-Spangled Banner" faded before the annual Army-Navy basketball game at West Point, Nick Mottern took off his jacket and revealed his T-shirt. It bore the letter "Q." His seven friends standing alongside him in the next-to-last row of the Holleder Center took off their jackets and shirts, uncovering their T-shirts.
They stood silently, each wearing a shirt emblazoned with lettering that when put together spelled out "U.S. Out of Iraq."
A few minutes later, they were escorted out by military police and the facility manager.
A month later, the garrison commander banned them from West Point for five years...
A lawyer for the U.S. Attorney's Office said West Point officials were not singling out the protesters. All political demonstrations are barred at the facility, Assistant U.S. Attorney Mara Trager said.
Back during the Vietnam War, hippies infrequently tried to disrupt parades. Two companies of cadets in each parade were trained how to respond if anyone ever tried to rush the color guard and take the flags.
Update, 7/22/09: As I sad above, courts consistently hold that you have no right to protest on a military installation:
A federal jury ruled today that West Point officials did not violate the rights of eight anti-war protesters during a 2004 demonstration on the military base.
The eight protesters, all from Westchester, had claimed that their First Amendment rights were violated by facility manager John Spisso and garrison commander Army Col. Ann Horner when they first booted them from an Army-Navy basketball game and then banned them for five years for staging a protest wearing T-shirts that read "U.S. Out of Iraq."
Long-haired hippies, smokin' dope and bad-mouthing their country :-)