The nature of war is constant change. We live in an era of exponential technological acceleration which is transforming how wars are waged. Today, the battlespace is transparent; multi-domain sensors can see anything, and long-range precision fire can target everything that is observed. Autonomous weapons can be unleashed into the battlespace and attack any target from above, hitting the weakest point of tanks and armored vehicles. The velocity of war is hyper-fast.

When we think about the future of war, the military and Washington and most everyone gets it backwards. We think in terms of buying single military systems, such as fighter jets or aircraft carriers. And when we think about modernizing those systems, we think about buying better versions of the same things. But what really matters is not the single system but "the battle network"—the collection of sensors and shooters that enables a military to find an enemy system, target it, and attack it.

War Transformed provides insights for those involved in the design of military strategy, and the forces that must execute that strategy. Emphasizing the impacts of technology, strategic competition, demography, and climate change, Mick Ryan uses historical and contemporary anecdotes to highlight key challenges faced by nations in a new era of great power rivalry. Just as previous industrial revolutions have advanced societies, the nascent fourth industrial revolution will have a similar impact on how humans fight, compete, and build military power in the twenty-first century.

After decades of poising on the brink, the United States and China finally go to war when China invades the island of Taiwan. Deploying their most futuristic technologies in this grand strategic competition of the twenty-first century, the stakes could not be higher. Not only the future of the Taiwanese people but the fate of the world lies in the balance. In an era when humans no longer just use machines, but partner with them in all aspects of military operations, this fictional account views this future war through the eyes of the American, Chinese, and Taiwanese caught up in the maelstrom.

The second Nagorno-Karabakh war—fought between Armenia and Azerbaijan between September 24 and November 10, 2020—was the first war in history won primarily by unmanned systems. This forty-four-day war resulted in a decisive military victory for Azerbaijan. Armenia was outfought, outnumbered, and outspent and lost even though they controlled the high ground in a mountainous region. The fact that Azerbaijan won the war is not extraordinary. What is exceptional is that this was the first modern war primarily decided by unmanned weapons.