"there is none."
There are numerous soldiers accounts of why they joined up, but of course, they're all liars.
I reckong Paxman dedicated at least ten minutes to Bottomly's 'show' and threats of being sacked were included in that.
The various inducements listed, emotional blackmail and White Feathers particularly, are still available on line in the form of posters from the time.
None so blind... as the saying goes.
Jim Carroll