68th Antiaircraft Artillery Gun Battalion was first organized as 1st Battalion, 68th Coast Artillery during World War I. Inactivated 1919; reactivated November 1939 as 1st Battalion, 68th Coast Artillery. Overseas November 1942 (1st Battalion participated in Invasion of North Africa; landed with 3d Infantry Division at Fedala, French Morocco, an element of II Corps). Landed in Sicily 9 August 1943. At Salerno 31 October. At Anzio 22 January 1944. Regiment broken up 4 June 1944 and elements redesignated - 1st Battalion became 68th AAA Gun Battalion. Participated in the Invasion of Southern France and the drive into Germany. Returned to the U. S. in April 1946. Inactivated April 1946; disbanded 1949.
Your Dad apparently joined the battalion as a replacement. Under a Points System devised during the war, individuals were allotted points for (1) time in service, (2) time overseas, (3) campaign participation credits, (4) wounds, (5) decorations and other special characteristics of service. A certain number of points made the individual eligible for rotation to the U. S. When the war ended, those having the requisite number of points were transferred to units returning to the U. S. or sent home on individual orders. Those lacking the required number of points were assigned to units serving as occupation troops or units not yet slated for return to the U. S. Your Dad obviously didn't have sufficient points to rotate with the battalion.
The battalion is credited with having participated in the Invasions of North Africa and Southern France and the Algeria-French Morocco, Tunisia, Sicily, Naples-Foggia, Anzio, Rome-Arno, Southern France, Rhineland and Central Europe Campaigns. Campaign credits to which your Dad is entitled would have to be determined from official records. The above is a general history of the battalions wartime activities. Battery C's activities may or may not parallel the battalion's; likewise, your Dad's activities may or may not parallel his battery's.