Great pieces of family history that I am sure you treasure. My great uncle was killed at Zonnebeke in 1915 and buried at Potijze Cemetery, I have found quite a bit about him including his service record.My family have got some letters sent between my Great Grandfather, who had been an NCO before the war and was stationed in a supply depot at home, and one of his younger brothers who was in France. They're an interesting read, showing how soldiers at the front thought and how they were getting on. Quite a lot of the letters are asking my Great Grandfather to send him stuff that he needs. The brother was eventually killed in a train accident behind the lines, not in action.
My dad was a Regular Soldier joining in 1934 and lost a leg during WWII, I am fortunate that his first hand account of a large chunk of his service, including the day he was shot, is recorded on the Durham Light Infantry website.

One of the most disturbing scenes it that DVD was sending the squaddies over the top unarmed, deliberately, to draw fire and find out exactly where the German gun placements were. Talk about cannon fodder.