- United States Army Signal Corps was founded in 1860 by Major Albert J. Myer
- Royal Corps of Signals was founded in the United Kingdom (under the name Telegraph Battalion Royal Engineers) in 1884
- The Royal Canadian Corps of Signals was formed in 1903 as the Canadian Signalling Corps.
- First Anzac Signal Company was formed in 1916: http://www.diggerhistory.info/pages-badges/patches/signals.htm
- Royal Australian Corps of Signals
- Telegrafregimentet Royal Danish Signal Regiment