Perhaps the sartorial addition for the 'march' should be a piece of string knotted around the arm. This used to be worn as a reminder that something needed to be done.
Perhaps the symbolism is relevant to not just the politicians but also the great mass of the public who are complicit in their ostrich-like ignorance of the fact that we are in a real shooting war which, whilst remote, is of direct consequence to their safety both today and far into the future.
You don't need to march, but EVERY supporter in the Army/Navy Match at Twickenham needs to wear that string and the minute kick off occurs the roar of the crowd should extinguish to pin-drop silence for one minute. The coverage would be truly global.
But there again how widespread is the discontent, is it just the serial ranters of PPRUNE, Rum Ration ans ARRSE who make a large ripple in an extremely small fish pond?