<P> By means of broadcasts from Britain, the French Resistance found a voice that could be heard on the continent, serving to counter the Nazi propaganda broadcasts of Radio Paris and Radio Vichy . Realizing the negative effect that it had on their occupation, the Germans quickly prohibited listening to Radio Londres . Radio Londres also encouraged rising up against the occupation, including De Gaulle's calls to empty the streets of Paris for one hour, demonstrations, and the preparation of D - Day, or the V for Victory campaign, involving drawing a V sign on walls as an act of subversion . It also sent coded messages to the French resistance (see below). </P> <P> Breaking with the formal style of the French radio stations, some young announcers (Jacques Duchesne, Jean Oberlé, Pierre Bourdan, Maurice Schumann and Pierre Dac) changed the tone with personal messages, sketches, songs, jokes and comic advertising . </P> <P> Georges Bégué, an operative with the Special Operations Executive (SOE) had the idea of sending seemingly obscure personal messages to agents in the field, in order to reduce risky radio traffic . </P> <P> Broadcasts would begin with "Before we begin, please listen to some personal messages ." It was clear to nearly everyone that they were coded messages, often amusing, and completely without context . Representative messages include "Jean has a long mustache" and "There is a fire at the insurance agency," each one having some meaning to a certain resistance group . They were used primarily to provide messages to the resistance, but also to thank their agents or simply to give the enemy the impression that something was being prepared . Because these messages were in code, not cipher, the occupiers could not hope to understand them without a codebook, so they had to focus their efforts on jamming the messages instead . </P>

What does john has a long mustache mean