Formation of Signal Wing
The Greek armies had the Torch Telegraph and the Water Telegraph, and the Roman Army used coloured smoke.
During the 16th century, beacons were used, in 1796 the Admiralty adopted a shutter-type machine known as the 'Murray Lettering Telegraph'.
Morse Code and electric telegraph were used for the first time in the Crimean War, following the Abyssinian War of 1867, a Signal Wing was formed by the Royal Engineers at Chatham.