
1950 the Battalion deployed to Korea in support of the United Nations Forces.
The 84th participated in all ten campaigns of the Korean Conflict, and it was there that the
I Corps Commander, Lt.General John W. "Iron Mike" O'Daniel, gave the 84th the nickname:
"Conquerors of the Imjin".
The first design of the coat of arms was originally approved for the 84th Engineer Battalion on 8 October 1941. It was amended to correct the history on 27 February 1942. It was redesignated for the 84th Engineer Construction Battalion on 17 July 1953. It was redesignated for the 84th Engineer Battalion on 27 March 1956. A new design/the current design was approved for the 84th Engineer Battalion on 7 December 1966. The first design of the distinctive unit insignia was originally approved for the 84th Engineer Battalion on 20 August 1941. It was redesignated for the 84th Engineer Construction Battalion on 17 July 1953. It was redesignated for the 84th Engineer Battalion. A new design/the current design was approved for the 84th Engineer Battalion on 30 March 1967.
The redesignated battalion was deployed to Korea in 1950 in support of the United Nations Forces. The Battalion participated in all ten campaigns of the Korean War. During the conflict, the battalion was twice awarded the US Navy Meritorious Unit Citation for its work in support of the Marine Corps. It was during this period that the words "Never Daunted," the description used by South Korean President Syngman Rhee as he presented the Republic of Korea Presidential Unit Citation to the battalion for bridging the Imjin River, were adopted as the battalion motto.
https://www.koreanwar.org/html/units/84en.htm
https://www.heraldry-wiki.com/heraldrywiki/wiki/84th_Engineer_Batta...