History of the V Sign

From Wikipedia:

Winston Churchill used a V sign in both versions to symbolize “V for Victory” during World War II. Early on in the war he used palm in (sometimes with a cigar between the fingers).[1] Later in the war he used palm out.[2] It is thought that the aristocratic Churchill made the change after it was explained to him what it signified to the other classes in Britain.[citation needed] He developed the idea from a BBC campaign.