"I did read her "A Kingdom United" a couple of years ago. "
Then why are you arguing that men joined up because they supported the cause - in fact, in 'A Kingdom United', she argues that the reasons for joining up were varied and complex and they fluctuated as the circumstances changed.
She puts much of the reason down to the pressure of propaganda and points out that the inability to maintain that pressure led to the introduction of compulsion.
You most certainly have not read it - bloody nonsense!!
Jim Carroll