2 June 2026

Reassessing Biddle’s Modern System: data-linked kill chains, advanced algorithms, and the evolution of combined arms warfare in the Russo-Ukrainian war

Taylor & Francis Online  |  Ji-Jen Hwang

The Russo-Ukrainian war demonstrates how data-linked kill chains and advanced algorithmic warfare are reshaping combined arms warfare (CAW), prompting a reassessment of Stephen Biddle’s Modern System theory. Data-linked kill chains enhance battlefield transparency by compressing sensor-to-shooter cycles and enabling near-real-time coordination. Algorithmic systems, including drone swarms and cross-domain synchronization, create new forms of adaptive coordination at the tactical level, though they remain vulnerable to electronic warfare and deception.

Strategically, operational success increasingly relies on informational and algorithmic dominance rather than solely on force concentration. The Ukrainian experience reveals that kill chains provide a necessary but insufficient platform for advantage, adversary adaptation rapidly erodes algorithmic superiority, and doctrinal integration remains decisive. The article concludes that while Biddle’s Modern System largely explains battlefield outcomes, algorithmic systems offer a conditional path toward CAW transformation.

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