Background: As nations increasingly integrate Offensive Cyber Operations (OCO) into their military and strategic arsenals [3, 15], the risk of unintended consequences and collateral damage to non-targeted systems and populations grows. Unlike conventional warfare, the interconnected and often ambiguous nature of cyberspace complicates the prediction, control, and assessment of these secondary effects [4, 11].

Objective: This systematic literature review aims to synthesize and analyze the existing doctrinal, legal, and academic literature to provide a comprehensive understanding of collateral effects in OCO. It seeks to define the problem, evaluate the applicability of traditional legal and military principles, and identify current methodologies for risk assessment.

Methods: A systematic review of 17 foundational sources was conducted. The selected literature includes peer-reviewed articles, key government reports, and military doctrine. A thematic analysis approach was employed to extract and synthesize data concerning definitions, legal frameworks (e.g., Law of Armed Conflict), strategic principles (e.g., distinction, proportionality), and assessment models [8, 16, 17].

Results: The analysis reveals three key themes. First, a significant gap exists between the doctrinal imperative to minimize collateral damage and the practical ability to do so in complex cyber-physical environments [7, 10]. Second, core principles of international law, such as distinction and proportionality, are exceptionally difficult to apply in OCO due to the shared nature of digital infrastructure [14]. Third, while nascent methodologies for assessing collateral damage exist [17], they are not yet widely adopted or sufficiently mature to address the full spectrum of potential unintended consequences.

Conclusion: The current understanding and management of collateral effects in OCO are dangerously underdeveloped. This review highlights an urgent need for more robust assessment frameworks, refined legal interpretations, and greater strategic foresight to mitigate the potentially catastrophic ripple effects of digital warfare.