War time communication

Voice

Jan 1, 1000

Used for talking to each other

Sign Language

Aug 31, 1620

Used for talking to eachother when under silent conditions

Pigeon Post

Aug 14, 1760

Tie a letter on to a pigeons foot and they will send your letter

Morse code

Apr 29, 1791

Code for Morse Code

Morse Code Tapper

Apr 29, 1791

Used to talk to eachother with out noise.

Codes

Aug 13, 1794

Used for secret messages

Air Horn

May 22, 1799

Ship air horn for on ships

Flares

Aug 29, 1877

Used for letting aeroplanes where to land

Walkie Talkie

Sep 6, 1938

Used for talking to eachother form far away

Letters

Apr 27, 1957

To speak to families over the world etc