Hello, are you still looking for information on your grand uncle, the late Lt Col Tom Trotte?? If so, we may be of assistance. My wife's grandfather (still alive and living in San Diego at the age of 91) was a Capt in the Third battalion of the Fifth marine division, reporting directly to Lt Col Trotte, and was with him when he was KIA. We could get you in touch with him and he'd be happy to share his knowledge with you.