Enlisted in the Australian Imperial Force on the 13 June 1915, and allotted Army number 2606. He stated on enlistment that:
He was born at Kempsey, New South Wales on 9 July 1892, 
His next of kin was his Mother Mrs Islet Maud Hudson of Hickeys Creek, Macleay River , New South Wales.
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Justice joined the Australian Imperial Force on the 13 June1915 and was taken on strength 3rd Battalion
Justice saw active service in France.
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Gallipoli - Justice Hudson was awarded a Mention in Despatches for his service during the Gallipoli campaign
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Disembarked in Darwin, Northern Territory .
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Rank: Private
Discharge Date: 16 March 1919