Anzac biscuit recipes (anzacwebsites.com)
A sweet biscuit based on rolled oats, traditionally regarded as having been
baked by Australian wives, girlfriends and mothers for soldiers during World
War 1. Referred to within Australia as "Anzac biscuits", not
as "Anzac cookies".
Hard tack (awm.gov.au)
WARNING: As biting these biscuits can break your teeth, they
should be consumed after being ground up or soaking first
(perhaps in gravy).
Although also known as the Anzac wafer or Anzac tile, hard tack was not based on rolled oats (as Anzac biscuits were) but were made from
wholemeal and white flour. They were provided to Australian soldiers in World
War 1 by the army, and have been used by other armies.