Between The World Wars
There was substantial SIGINT work between the World Wars, although the secrecy surrounding it was extreme. While it was primarily COMINT, ELINT emerged with the development of radar.
Both sides developed direction-finding (DF) and communications interception stations during the war, although those programs often began with naval search & rescue.
Read more about this topic: Signals Intelligence In Modern History
Famous quotes containing the words world and/or wars:
“He that is giddy thinks the world turns round.”
—William Shakespeare (1564–1616)
“Since wars begin in the minds of men, it is in the minds of men that the defences of peace must be constructed.”
—Constitution of the United Nations Educational, Scientific, and Cultural Organization (UNESCO)