Welcome back. This is post number three in our series on defense and simulation. Today, I want to make the case for sustainability – despite the fact that it’s no longer fashionable, assuming it ever was. Regardless, it remains essential. Ever more so. Back when I was a fresh recruit in the Swiss Armed Forces, the old hands had a simple metaphor: armed forces are an insurance policy. You pay today because tomorrow is unpredictable. Entire industries as well as academia thrive