Three Men in a Trench and One Man is using a Wireless Telegraph Set, The National Archives of the United Kingdom.
Soldiers Installing Telegraphy Lines, 1917, BFI Archives.(No Audio)
Many hours and lives were spent maintaining telegraphy lines causing some to argue it undermined the war effort. Reports from the Royal Engineers Signal Service recorded 50% of soldiers sent to maintain telephone wires dying due to shellfire. While the loss of many family members is horrible, the lives given to new technology gave soldiers more efficient and discrete communication, positively affecting the war.