From the beginning of June 1944, the Allies inundated the network with messages. On 1 June alone, over 200 messages were sent, making it clear to those listening that something was in the works. Although in some places the Axis jamming was more effective than others, the background noise and static were not enough to drown out the sound of Beethoven's 5th Symphony, the first four notes of which correspond to the dot-dot-dot-dash of the Morse code letter V for Victory.