An advance party of the 93rd Infantry Division arrived at Guadalcanal on 29 January 1944. The rest of the division landed between 6 February and 5 March, one regiment disembarking at the Russell Islands on 7 February. The bulk of the division engaged in training, labor and security duties on Guadalcanal and the Treasury Islands from 7 June and both Hollandia Dutch New Guinea from 30 October. Component units performed similar duties on Finschhafen from 12 October 1944 to 31 March 1945, on Los Negros from 29 September 1944 to 16 March 1945, and on Biak from 10 October 1944 to 1 October 1945. The division's combat elements moved to Bougainville Island on 28 March 1944, and were attached to the Americal Division on the 30th. On that date they entered combat, assisting in attacks on the enemy perimeter. These elements, including the 25th RCT, reconnoitered across the Laruma River on 2 April, and in the Torokina River Valley from 7–12 April 1944. The 25th RCT operated against the Japanese along the Kuma and East-West Trails during May 1944. The combat team left for the Green Islands during May and June. The 93d Rcn. Troop, attached to the XIV Corps, remained to raid, patrol, and maintain perimeter positions. The troop began training 12 September 1944, and moved to Finschhafen on 1 November. Security patrols had scattered contacts with the enemy at Urapas from 3 to 15 January 1945, at Wardo on Biak from 6 November-22 December, and at Wari on Biak on 31 December. The security detachments at Wardo and Wari were withdrawn on 9–10 February 1945.