"Follow me"
In the movie pork chop hill Lt. Suki Ohashi's wears an orange panel maker as a vest also this is reported in the Book by S.L.A. Marshal as a tool for the platoon to ID him.
From USmilitariafourm.com
I stalled when it came to finishing the two tone cloth panel worn by 7th Division soldiers on Kwajalein. I had searched high and low for good references. I had looked at dozens of period photos and film footage. The trouble was, it was all in black & white, so I was unsure what colors were right. And then a book on the campaign came out with an illustration showing that the panels as red and white. So I went ahead. On the left is how it first came out. Since then, I discovered more references including an article by the Company of Military Historians and some color footage shown in WW2 in HD. The dark sections actually seem to be a blue black color. I repainted the panel. I tried to tint some black paint with a bit of blue, but it looks all black. I may try to dry brush a bit of blue on these sections...
ID panels in use at 9:00 battle for marshal islands
Judging by the video it appears that the leading elements of the attack wore the identification panels vs Lt. Ohashi's use to id himself to his troops