The nation's first war crime murder trial involving an Australian Defence Force soldier won't happen until at least 2027, giving Defence Minister Richard Marles time to suppress certain matters.

Both the prosecution and defence in the case of former SAS soldier Oliver Jordan Schulz say they are yet to see all the evidence because a decision about what can be released hasn't yet been made.

Schulz pleaded not guilty in the NSW Supreme Court on Friday to the war crime of the murder of a young man in Afghanistan in 2012.

But a trial date was not set because national security concerns had delayed both sides from seeing much of the evidence against Schulz.

"There is no realistic prospect of a trial beginning in 2026," prosecutor Sean Flood SC said.

Schulz's lawyer agreed.

"I understand the

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