Do alliances work?
With ANZUS a core pillar of our own strategic policy, it should come as no surprise that Australians frequently turn (and return) to the subject of just how reliable that alliance is. Most of the debate tends to be remarkably impressionistic. For some, history is the best guide—and Britain’s inability to come to Australia’s aid after the fall of Singapore in 1942 a salutary warning about the dangers of a smaller power becoming too reliant on a great power to protect it. For others, reliability is simply assumed—sometimes on the basis that if the US refused to honour its ANZUS commitments all of its other alliances would come under increased pressure.
But we should look at some data to take the impressionism out of the debate. We should be interested not just in the big question—is ANZUS reliable or isn’t it—but in the specifics: how reliable is it? There are several ways of judging the utility of alliances—including whether they deliver strategic gains during peacetime through training, technology, intelligence exchange and the like. Still, the real test of an alliance’s reliability is whether alliance partners end up honouring their commitments to each other on the battlefield.
It’s instructive, then, to turn to the academic literature for a set of insights on just how reliable alliances actually are.