sentences:  While initial Allied G2 estimates of Japanese troops was approximately 5,000, an intercepted message at the end of April gave the ration strength as 10,800, though it was thought this was a figure based upon projected, rather than, current strength.The invasion force assembled largely in the Humboldt Bay area near Hollandia, and after only limited rehearsals departed late on 25 May.After a 45-minute pre-landing naval bombardment, the 41st Infantry Division of the United States Army landed on Biak on 27 May 1944, initially with the 162nd Infantry Regiment, and soon followed by the remainder of the division, including the 163rd and 186th Infantry Regiments.