“Feb 4 – Camped at 274 Rep’l. Co. 4th Rep’l. Depot. APO703. Did general duty while waiting for assignment. Plenty of rain here.” “Rep’l” Stands for replacement duty (at least we think it does from researching online, if it does not feel free to correct us below by commenting). If you were in a replacement company during WW2 it essentially meant you where waiting around doing general duty tasks until you got called up to replace troops on the front line. His unit was in New Guinea, waiting to replace the American troops on the front line fighting the Japanese troops.