"In the American Civil War (1861–65), wide use was made of the electric telegraph. In addition to its employment in spanning long distances under the civilian-manned military telegraph organization, mobile field service was provided in the Union army by wagon trains equipped with insulated wire and lightweight poles for the rapid laying of telegraph lines. Another development for light signaling placed a movable shutter, controlled by a key, in front of a strong light. An operator, opening and closing the shutter, could produce short and long flashes to spell out messages in Morse code" (Encyclopedia).

"Morse Code was most proficient in World War II, especially among the Allies while they were in warships out at sea, communicating in secret from the Nazis" (Waller).

"Beginning in 1941, the British SOE (Special Operations Executive) and the American OSS (Office of Strategic Services) intelligence agencies both parachuted agents into occupied Europe to gather intelligence and organize resistance forces. Communication networks were critical for these agents, but so was the need for secrecy. One solution was the suitcase radio. Compact and capable of being adapted to many power supplies, the whole radio fit neatly into a small suitcase. The suitcase was dropped to agents by parachute in an airtight container" (Museum, National).

Branching from Morse Code, came this new idea that would be unrecognizable by the enemy.

"Every WWII combatant appreciated the need for an unbreakable code that would help them communicate while protecting their operational plans. The U.S. Marines knew where to find one: the Navajo Nation. Marine Corps leadership selected 29 Navajo men, the Navajo Code Talkers, who created a code based on the complex, unwritten Navajo language. The code primarily used word association by assigning a Navajo word to key phrases and military tactics. This system enabled the Code Talkers to translate three lines of English in 20 seconds, not 30 minutes as was common with existing code-breaking machines. The Code Talkers participated in every major Marine operation in the Pacific theater, giving the Marines a critical advantage throughout the war" (Office). 

"My wartime experiences developing a code that utilized the Navajo language taught how important our Navajo culture is to our country."- Chester Nez, a Navajo Code Talker