The threat that paces American force planning is not from Russia, but rather from China. This is leading to a new way of warfare. The authors call it ‘detect and engage’. The confluence of artificial intelligence, applied quantum mechanics and satellite networking permits dispersed and diverse units and platforms to operate as a unified joint force across sea, air, land and space. Cyber operations, practically indifferent to location, further enable the United States to reduce reliance on geographically concentrated and exposed forces. Advanced technology is just one step in operationalising new forms of warfare. Others include anticipating adversary responses; building robust inventories of extended-range weapons; knowing when and how to conduct close-in operations; integrating and empowering defence allies; and maintaining US forward presence. Harnessing leading-edge technology to improve global US military effectiveness reflects neither an isolationist nor an insular policy, but rather one of ongoing engagement.