Seemed a logical assumption but it doesn't appear any of them wound up serving on the Western Front in WW1. One of them would fight for Russia in the war but he survived it.I have a great uncle who sailed on one of Shackeltons later voyages as a cabin boy. He would remark on how much Shackelton smoked!
I think of those poor sods who got through the Endurance “adventure“, only to find themselves enjoying the western front. Tough time.
Most would be a bit long in the tooth for infantry come 1916, mid thirties is grandpappy age for infantry, and certainly they were considered quasi-celebrities and discouraged from doing so, I imagine.