Military Wiki
55th Telegraph Battalion
51st Signal Battalion
51st Signal Battalion Coat of Arms.png
Active 1916—Present
Country United States

 United States Army

Type Military Communications Unit
Role Expeditionary Signal Support
Size Battalion
Part of 22d Corps Signal Brigade
Garrison/HQ Joint Base Leiws-McChord, Washington
Motto(s) "Semper Constans" (Always Constant)
55th Signal Battalion Insignia.png

The 51st Signal Battalion (Expeditionary) is a military communications battalion of the United States Army currently part of the 22d Corps Signal Brigade and based at Joint Base Lewis McChord, Washington.


  • Constituted 1 July 1916 in the Regular Army as the 5th Telegraph Battalion, Signal Corps
    • Activated 12 July 1917 at Monmouth Park, New Jersey
    • Re-designated 1 October 1917 as the 55th Telegraph Battalion
    • Re-organised and re-designated 18 March 1921 as the 51st Signal Battalion
    • Re-organised and re-designated 1 March 1945 as the 51st Signal (Operations) Battalion
    • Re-organised and re-designated 8 September 1950 as the 51st (Corps) Signal Battalion
    • Re-organised and re-designated 13 February 1955 as the 51st Signal Battalion
    • Re-organised and re-designated 2008 as 51st Signal Battalion (Expeditionary)


Campaign Participation Credit

  • World War I: Lorraine 1918, St Mihiel, and Meuse-Argonne
  • World War II: Sicily (with arrowhead), Naples-Foggia, Rome-Arno, North Apennines, and Po Valley
  • Korean War: UN Defensive, UN Offensive, CCF Intervention, First UN Counteroffensive, CCF Spring Offensive, UN Summer-Fall Offensive, Second Korean Winter, Korea Summer-Fall 1952, Third Korean Winter, and Korea Summer 1953
  • Southwest Asia: Defense of Saudi Arabia, Liberation and Defense of Kuwait, and Cease-fire


Heraldic Items[]

Coat of Arms

  • Shield: Tenné, on a bend argent four telegraph poles in pale cross arm normal to bend sable.
  • Crest: On a wreath of the colours argent and tenmé the right winged foot of Mercury argent.
  • Motto: Semper Constans (Always Constant).
  • Symbolism: Orange and white are the colours traditionally associated with the Signal Corps. The bend is taken from the arms of Lorraine and St Mihiel and represents two of the campaigns in which the unit participated during World War I. The four telegraph poles represent the engagements of the battalion during World War I.

Distinctive Unit Insignia

  • The distinctive unit insignia is the shield and motto of the coats of arms.