http://www.ibiblio.org/pha/cno/cnorpt_3.html#combat The price of victory has been high. Beginning with the dark days of December 1941 and continuing until September 1945, when ships of the Pacific Fleet steamed triumphant into Tokyo Bay, the Navy's losses were severe. The casualties of the United States Navy, Marine Corps and Coast Guard reached the totals of 56,206 dead, 80,259 wounded, and 8,967 missing.
The U.S. Army counted 6,779 infantrymen (1024 officers and 5,775 enlisted) among its 159,414 troops in CBI, Oct 1944. At that time, CBI was split into two smaller commands: U.S. Forces, China and U.S. Forces, Burma-India. The peak strength of both commands was reached in Aug 1945, an aggregate of 173,608 personnel, which included only 5,146 infantrymen (991 officers and 4,155 enlisted men). http://sunsite.sut.ac.jp/pub/academic/history/marshall/military/mil_hist_inst/w/ww2pac5a.asc http://www.excite.co.jp/world/text/
http://sunsite.sut.ac.jp/pub/academic/history/marshall/military/mil_hist_inst/w/ww2pac4c.asc http://www.excite.co.jp/world/text/ Listed below are some of the sources searched. The official histories do not mention highest casualties inflicted by the 96th, nor do the various official summaries of the division's service. Kahn's brief account emphasizes the division's reputation for proficient marksmanship, noting 7,000 total "kills" on Leyte and 20,000 on Okinawa. The narrative portion of the division's unofficial history, The Deadeyes, p. 190, contains this description of the 21 Jun 1945 assault on Medeera Ridge in the Yaeju-Dake hill mass of Okinawa: "Although the 21st had not been a day of violent action, mopping up on that single day netted the amazing total of 1,347 Japs known killed." In the book's end section, among various reprinted newspaper articles, the following statements appear (pp. 307-308):
Rolfe, (Iowa) Arrow - "Statistics of the Battle [on Okinawa] Tell the story. The 96th killed more Japs than any other division on the island - Marine or Army."