There are limits to how much I can tell you because the investigations into this network by both the New South Wales police and the ADF investigative service are ongoing. But evidence collected to date has identified a group of men, within our ranks, who have allegedly produced highly inappropriate material, demeaning women and distributed it on the internet and defence's email networks. If this is true, then the actions of these members are in direct contravention to every value that the Australian Army stands for.

It is impossible to overstate the significance of this. This is the last citadel for women in our Army. The bias towards officers with an arms corps affiliation in choosing senior leaders has some justification. Close combat is the core business of the Army. But women are already ‘in combat’ due to the changing character of war. Formal recognition of this removes the last defence of those who are resistant to the widest employment of women in the Army, and by extension their promotion to the most senior ranks. It is quite conceivable now that a woman will serve as the Chief of the Army in light of this decision.

In that regard the Anzac legend – as admirable as it is – has become something of a double-edged sword. Many Australians have an idealised image of the Australian soldier as a rough hewn country lad – invariably white – a larrikin who fights best with a hangover and who never salutes officers, especially the Poms. This is a pantomime caricature. Every soldier is Mel Gibson in Gallipoli and frankly it undermines our recruitment from some segments of society and breeds a dangerous complacency about how professional and sophisticated soldiering really is.

[The] Army understands that cultural change is a long term process that requires commitment, diligence and continual evaluation. We recognise that in many ways we are behind the curve when compared to other corporate and public institutions, but we are determined to enact change in a meaningful and enduring way. We are dedicated to drawing on, and implementing, best practice by engaging with leaders who have undertaken successful and innovative programs in this field including Deloitte, the National Rugby League and the Australian Federal Police. Through these relationships we will develop methodologies and approaches to ensure sustainable diversity.

I was no longer comforted by the cliché that a ‘few bad apples’ were undermining the great work of the vast majority. Nor was I willing to argue that a widely publicised incident at our Defence Academy - where a sexual encounter between a young female cadet and a colleague was telecast via Skype - was no worse than conduct among young people on civilian campuses.

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By now I assume you know my attitude to this type of conduct. I have stated categorically, many times, that the Army has to be a inclusive organisation, in which every soldier, man and woman, is able to reach their full potential and is encouraged to do so. Those who think that it is okay to behave in a way that demeans or exploits their colleagues, have no place in this army. Our service has been engaged in continuous operations since 1999, and in it’s longest war ever in Afghanistan.

I was angry, that in a crisis, those three women, and many others to whom Liz Broderick had spoken, had not been able to rely on their mates. In other words the very thing that we claim as our defining ethos had been used to exclude and humiliate others. I am resolved to make improvements to our culture one of the fundamental elements of the legacy that I hope to leave the Australian Army.

Our monopoly on violence and the particular place we occupy in our national psyche, demands that we must earn and maintain a high level of trust among our community. They are entitled to expect more of us than other institutions – and we keep telling ourselves that we are special – and custodians of the best of our military heritage. This places a very great burden on us, which warrants zero tolerance towards those who violate that fragile community trust.

On all operations, female soldiers and officers have proven themselves worthy of the best traditions of the Australian Army. They are vital to us, maintaining our capability now, and in to the future. If that does not suit you, then get out! You may find another employer where your attitude and behaviour is acceptable, but I doubt it. The same goes to those who think toughness is built on humiliating others.

But a top down approach can take you only so far – even in a hierarchical organisation like an Army. I can impress my senior leaders with the need to change and give them clear guidance as to how to proceed but it is vital to get buy in at all levels of the organisation.

But in too many cases the team has been defined through exclusion of women. This simply has to stop – both for altruistic and pragmatic reasons. I like to think I am as altruistic as the next person but my motives are essentially pragmatic. Organisations with high levels of what can be termed as ‘social capital’ are more effective, both in their performance and ability to retain their highly skilled personnel much longer.

And finally, it is truly fitting that I bring this message to an event held under the auspices of the United Nations. The UN does so much to alleviate suffering and disadvantage amongst women throughout the world, not least in peace building efforts in fractured states and societies, where violence against women and girls is horrific in both its nature and scale.

We in the ADF occupy a special constitutional role. We train for mastery of military force and are entrusted and sanctioned by the Government to employ extreme violence in support of national interests. Moreover, I am all too aware, that in many conflicts, rape is systematically employed by soldiers against women. Any nexus between an Army such as the one I aspire to lead and sexual assault is absolutely unacceptable. I will take all necessary steps to stamp out any hint of it among my soldiers.

Every one of us is responsible for the culture and reputation of our army and the environment in which we work. If you become aware of any individual degrading another, then show moral courage and take a stand against it. No one has ever explained to me how the exploitation or degradation of others, enhances capability, or honours the traditions of the Australian Army.