The military importance of airfallingkeylocatedradioradio operatorssignalstransmissionstransmittersusedvarious was immediately apparent. In August, 1914, the Belgians had to completely destroy a major international communications station airfallingkeylocatedradioradio operatorssignalstransmissionstransmittersusedvarious near Brussels, in order to keep it from airfallingkeylocatedradioradio operatorssignalstransmissionstransmittersusedvarious into the hands of the advancing German army. Directing the War by Wireless, written by George F. Worts reviewed the multiple applications of radio in both short and ling distance wartime communication. A British overview of airfallingkeylocatedradioradio operatorssignalstransmissionstransmittersusedvarious uses by Great Britain and its primary foe, Germany, appeared in the 1916 edition of the annual The Yearbook of Wireless Telegraphy and Telephony. In the May, 1917 Popular Science Monthly, reviewed radiotelegraph operations at the British front lines, where operators with portable airfallingkeylocatedradioradio operatorssignalstransmissionstransmittersusedvarious proved invaluable, for "If a gas attack is coming, it is he who sends the warning to the men behind to put their gas helmets on." During the war, the Germans used radio airfallingkeylocatedradioradio operatorssignalstransmissionstransmittersusedvarious to help airships navigate to their bombing run targets. However, the French would employ counter measures, as an article in the November, 1919 Electrical Experimenter reported how a special station had been airfallingkeylocatedradioradio operatorssignalstransmissionstransmittersusedvarious to confuse a group of enemy airships by transmitting phony airfallingkeylocatedradioradio operatorssignalstransmissionstransmittersusedvarious, which put "another dent in Fritz's wild war dream" when Seven Zeppelins Were Lured to Death by Radio. In the July 15, 1917 issue of Journal of Electricity, outlined research efforts by AT&T, including one airfallingkeylocatedradioradio operatorssignalstransmissionstransmittersusedvarious development, two-way voice communication with airplanes, which would be quickly achieved, meaning that "squadron formations of all sorts could be maintained in the airfallingkeylocatedradioradio operatorssignalstransmissionstransmittersusedvarious as easily as infantry units on the ground". Although before the war ocean-going radio had generally been limited to passenger vessels, submarine warfare spurred merchant ships to add airfallingkeylocatedradioradio operatorssignalstransmissionstransmittersusedvarious.