Cognizance ribbons are short portions of ribbon folded into a loop (or interprentations of such) that are utilized in countries such as the United States, Australia, the UK and Canada as a manner for the wearer to make a sensitive statement of advocating for a cause or issue. A yellow ribbon is a sign with varied meanings, mostly connected with those waiting for the coming back of a loved one or of military troops who are temporarily not able to come home.
A yellow ribbon "support our troops" mailbox
A service flag in the United States is a legalized banner that family people of operating members serving in the Armed Forces of the United States during any moment of hostilities or war can display.
Criticism and opponents
Political analyst Noam Chomsky has censured the slogan, saying, that the argument of public relations slogans like "Support Our Troops" is that they don't signify anything and that it represents the entire point of good propaganda. You want to construct a slogan that no one is going to be against and I suppose everyone will be for, because nobody knows what it means, because it doesn't mean anything. But its imperative value is that it distracts your attentiveness from a question that does signify something, do you support our policy? And that's the one you're not allowed to talk about.