No idea what's going on with that wikipedia link 2 posts above, it was working properly when I posted it, but it's now leading to a supposedly non existent article, but the article does still exist.
I thought that I might have messed up the URL, but I've checked it, and it looks fine.
Anyway, if you google search for " Morning report (United States military) " you'll see the wiki article at the top of the search results, and that link is exactly the same as the one that I posted above, but the link from the google search does work properly and it leads to the wiki article.
The wiki article contains a link to a very useful article about morning reports which explains them in quite a lot of detail.
http://www.327engineer.com/morningreports/MorningRportsIntro...If someone was killed, wounded, missing, transferred to hospital, or transferred into or out of a unit, at the company/regimental level, that event would be recorded in the morning report which immediately followed the relevant event.
Someone who was killed or wounded or missing, would also be listed on the post war regimental casualty list, which lists every casualty of the unit, that will list their surname, first forename, and any other forename initial or initials, their service number, and their company, and the campaign in which they became a casualty.
The campaign entry for example in the case of an infantry regiment which served in Europe in France and Germany from the time of the invasion onwards, lists the campaign for each individual casualty as either France or Germany, but for the France casualties each individual casualty is listed as either France, Normandy, or Northern France.
So I suspect that in the Pacific campaign, the casualty locations on regimental casualty lists would have been similarly specific.
The events in which a regimental unit was engaged on a day by day basis would be recorded in a narrative format in what were called, after action reports.
For example...
http://cdm16040.contentdm.oclc.org/cdm/ref/collection/p4013c...You might get a bit of help with identifying likely units and researching unit histories here...
http://www.history.army.mil/html/forcestruc/lh.htmlhttp://www.carlisle.army.mil/ahec/index.cfmhttp://www.carlisle.army.mil/ahec/visit.cfmhttp://www.carlisle.army.mil/ahec/research.cfmYour determination, persistence, attention to detail, and to original source documents, creative thinking and approaching your search from different angles, does you great credit.
I suspect that a lot of people who use these sort of sites believe the advertising guff of the genealogy companies, which tries to make their users believe that it's just a matter of typing in someone's name and all of the answers and information will be effortlessly presented, which of course, isn't the case.
The bottom line with this sort of thing, is that information can only be found if it really does exist, and finding a possible source, if it exists, is the first step to possibly finding the information, but with persistence like yours, it's often surprising how much can eventually be found, even with very little starting information.