In keeping with his commitment to do exactly what Tony Abbott would have done, but with more style, Malcolm Turnbull has just announced that we are to spend a trillion dollars on fighter plans and submarines. Apparently, there are lots of problems with the hugely expensive F-35 Joint Strike Fighter, which Australia has on order. Rather than look at the details, it’s worth asking we are, yet again, arming ourselves to refight World War II.

World War II was fought on land, sea and air. Submarines and fighter planes played a crucial role. But since 1945, things have changed. The 70 years since 1945 have been marked by near-continuous land warfare in various parts of the world [1]. On the other hand, there has been essentially no naval warfare, in the sense of battles between ships or carrier based aircraft, with the exception of the absurd and unnecessary Falklands conflict. Air combat between fighter planes lasted a bit longer after 1945, playing a big role in the Korean War, but has been pretty much non-existent since the 1980s. All warplanes, these days, are effectively bombers, usually hitting targets that have previously been rendered defenceless by missile attack. Yet the problems of the F-35 stem, in large measure, from its capacity to engage in hypothetical dogfights.

Fighter planes and their pilots still attract most of the attention, and nearly all the glory, in air warfare. But the real work is increasingly done by drone operators, commuting from the suburbs to undertake their task of destruction in air conditioned offices: since they see exactly what they have done, the job is apparently much more stressful than that of a fighter pilot. So far, only the US is using military drones on a large scale, but it’s obvious that this is the way of future wars. The specific problems of the F-35 are irrelevant in this context: it will in any case be obsolete by the time it’s delivered.

As for submarines, Wikipedia gives a list of submarine actions since 1945. There have been six of them, three involving the sinking of surface ships, and three involving the firing of cruise missiles, something that can be done from craft as small as corvettes.

Submarines have been much more notable for sinking themselves. Wikipedia lists four US submarines sunk at sea since 1945, two with all hands. The Russians have done far worse, losing 18 subs, most notably the Kursk, lost with all hands in 2000.

Submarines aren’t obsolete in all their possible uses. If the world ends in a nuclear holocaust, the final missiles will probably be fired from nuclear-armed submarines. But the revival of old-style submarine warfare, using our subs to sink (say) Chinese naval vessels seems remote: the increasing power and range land based anti-ship missiles will soon make naval power obsolete. Even more remote (thankfully) is the use of submarines to attack merchant ships without warning, as was done in both World Wars.

Of course, no one can be certain that seemingly obsolete modes of warfare won’t be revived: For example, there was a cavalry charge during the Afghan war. But spending a trillion dollars on weapons systems that haven’t been used anywhere in the world for decades does not seem like a sensible use of public money.

Having posted this, I’m fully prepared to get a hammering from military buffs who will point out that I have got this or that detail of air and naval warfare wrong. But the idea that detailed knowledge of tech specs or the minor points of military history constitutes expertise is, in this context, quite wrong. In the absence of any significant air or naval warfare within living memory, supposed expertise is about as useful as Scott Morrison’s knowledge of unicorns. The only important thing to know is that, like nearly all military expenditure and nearly all wars, these proposed purchases haven’t been subject to a cost-benefit test and would fail it if they were.

fn1. There’s a case that land warfare has become less frequent, or at least less bloody over time. But it’s hard to tell.