The Defence Force is responding to major new allegations from investigative journalist Nicky Hager.

Hager claims the Defence Force has committed war crimes, that sexual violence within a unit has been covered up, and the SAS hid alcohol inside food supply shipments.

Hager says a string of current and former Defence Force members approached him after his last book - to tell all.

In an initial response to specific points, the Defence Force says the claims are either incorrect, or that it has taken appropriate action..

It is refusing to comment on one case as it's before the courts, and on another case, because it says it'd breach the complainant's privacy.