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'In addition it is my responsibility to serve this beautiful country of ours and every individual within it.
'Earning my skippy and becoming a part of the Royal Australian Regiment means everything to me,' Sam added.
'I feel the need to give back to our ancestors and the brave men and women who served and gave there lives for the freedoms we have today,' he wrote on Instagram
The reality star finished: 'Proud to be Australian and be involved in our nation's defence.'
Sam recently graduated from the Kapooka Army Recruit Training program in Canberra.
He even received the Most Outstanding Soldier award upon completing the course, according to a post on the Army Recruit Training Centre - Kapooka Facebook page.