I’ve never Served, but mine is the first generation in my mother’s family not to have in one form or another – mostly Army (Scots – mum’s brother, their father and his brother, their grandfather and great-grandfather . . . If he hadn’t been born with psudo-achondroplasia my older brother would almost certainly have joined).
I inherited a couple of excellent books of War Poems from the Great War: 1914 and Other Poems by Rupert Brooke (1915 Edition) and An Anthology of War Poems compiled by F. Brereton (1930 Edition). Beyond that the most moving poem I know from WWII is High Flight by Canadian Airman John Gillespie Magee – a copy of which I have hung on my bedroom wall:
https://nationalpoetryday.co.uk/poem/high-flight/