For WW1 and other records the best place is here:
http://www.naa.gov.au/collection/explore/defence/service-records/army-wwi.aspx
Go to 'Find and view a WW1 service record on line'
Excellent Lert. Many thanks. Found a grandfather who served in WW1 and who was left for dead, twice, on battlefields - only to be found alive among the corpses later. He acquired, not surprisingly, the nickname "Lucky".
Any idea, please, how extensive the records are if a full copy of service is requested?
With thanks
Rick