how much to tell?

Tomorrow is ANZAC day. and whilst telling Munchkin what we will be doing tomorrow ( getting up whilst its dark and going to a dawn remembrance service ( Hubby is letting her wear her great Grandma's medals this year) followed by a hot shotgun breakfast(no whisky for her though) her favourite word kept popping up  'Why?'

me: " To remember all the soldiers that didn't come home from war"
Munchkin: " Daddy's job is air force is daddy a soldier?"
me: 'yes'
Munchkin: "daddy comes home every day"
me: "yes he does"
Munchkin: " does daddy do war?"
me: "Sometimes yes, but not right now"
Munchkin: " oh," ( pause) "Can i help you do the mummy jobs"

Where do I go from here? how much should i tell her about Anzac Day and its meaning to our Military family? Do i really want her to understand its significance? because if so how will she feel before her Daddy goes on future Deployments?