After additional training, the 55th Arty was assigned to the 31st Bde, CAC, in August 1918 and served in France until the Armistice.
On 1-29-19 the 55th Arty CAC was transferred with 31st Bde to Fort Winfield Scott, arriving 2-23-19 with 9 officers and 170 EM.
The 31st Bde was then transferred to Fort Lewis, WA, arriving 10-4-19, and its strength was gradually built up to near peacetime levels.
This enabled the 55th to activate HHD&CTs of the 1st, 2nd, and 3rd Bns, as well as to moderately reinforce the firing batteries.
The three battalions were restructured with three batteries each by reassigning personnel from three companies manning fixed seacoast armament.
These additional designations were dropped on 7-1-24, when the regiment was redesignated 55th CA (TD) (Tractor Drawn) Regt.
The reorganized 1st Bn, 55th CA, moved to Ft. Kamehameha and Service Btry combined with HHB.
When filler personnel arrived from the mainland at the end of June 1942, two officers and 69 enlisted men from Battery C, 55th CA, with a pair of 155 mm GPF mobile seacoast guns was deployed to Canton Island in January 1942 where they later also manned four 4-inch navy guns.
Both batteries were released from Hawaiian Seacoast Artillery Command 9-30-43 and moved to Ewa, Oahu, staging for deployment to the Gilbert Islands in the Central Pacific as components of army defense battalions providing garrison forces.
In base the Arabic numerals 55 in red, on the tops of the numerals a caterpillar in red and above the caterpillar the symbol used on the French battle maps to indicate the position of 155mm guns in black (a disc with an arrow with doubled barbs issuant).
The Regiment saw heavy service during World War I and was armed with 155mm guns and caterpillar which are represented in the design.
The distinctive unit insignia was originally approved for the 55th Artillery Regiment on 13 April 1922.
Gules, on a pile wavy Or, a pine tree eradicated Azure, in base two fire arrows point up of the second inflamed Proper.
The blue pine tree denotes award of the Distinguished Unit Citation for the Ardennes Campaign of World War II.
The Regiment saw heavy service during World War I and was armed with 155mm guns and caterpillar which are represented in the design.