"Lucretia Morse, (Samuel Morse's wife) passed away in child labor" (Alter).

"Samuel Morse created the electric telegraph" (King).

(Develder)

"Samuel Morse, Alfred Vail, and Joseph Henry created the Morse Code communication system" (Smith).

"The first message of Morse Code was sent from Washington D.C. to Baltimore, Maryland, over the electric telegraph" (Team).

"After a conference in Berlin, Samuel Morse made the new communication system international" (Team).

 "The Valley Printing Telegraph Company was founded" (History).

(Keeling)

"Morse Code was first introduced into war during the Crimean War" (Ray).

The transcontinental telegraph line was built across the  United States. Two years later they built a line across Africa, Asia, and Australia, too (History).

"The American Civil War, where they used the heliograph system, and telegraphs to communicate through Morse Code" (Encyclopedia).

"Samuel Morse passed away of Pneumonia in New York City" (Biography).

Guglielmo Marconi developed the wireless telegraph (Smith).

Marconi transmitted messages over the Atlantic by radio (Smith).

The first radio communication message was sent by voice (Cross).

The first television was invented that soon began to replace radio (Gregerson).

(Taylor)

"World War II began and Morse Code was very useful for communicating during battle, and in secret from the Nazis" (Waller).

"Navajo Code Talkers were introduced for the first time in the World War II" (Intelligence).

"The Korean War used Morse Code for the shipping industry, and to specifically communicate between aircrafts and ships" (Korean War Veteran).

"Morse Code used during the Vietnam War was used for the shipping industry, and to communicate in secret from the enemy" (Encyclopedia).

"Jeremiah Denton (a P.O.W.) was captured during the Vietnam War" (McFadden).

"The military stopped teaching Morse Code as a means of communication" (McMillan).

"Morse Code was used internationally and for Marine distress signals. It was replaced in 1999 by the Global Marine Distress and Safety System" (Baldwin).