The white feather is a widely recognised propaganda symbol. It has, among other things, represented cowardice or conscientious pacifism; as in A. E. W. Mason's 1902 book, The Four Feathers. In Britain during the First World War it was often given to males out of uniform by women to shame them publicly into signing up. In the United States armed forces, however, it is used to signify extraordinary bravery and excellence in combat marksmanship.
As a symbol of cowardice
The use of the phrase "white feather" to symbolise cowardice is attested from the late 18th century, according to the Oxford English Dictionary. The OED cites A Classical Dictionary of the Vulgar Tongue (1785), in which lexicographer Francis Grose wrote "White feather, he has a white feather, he is a coward, an allusion to a game cock, where having a white feather, is a proof he is not of the true game breed". This was in the context of cockfighting, a common entertainment in Georgian England.
The Crusades
Shame was exerted upon men in England and France...