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Analysis of the Legality and Effectiveness of U.S. Targeted Killing Operations

Focusing on the international legal framework, strategic utility, and legitimacy debates in the context of the century-long fight against terrorism, this research integrates cross-dimensional studies on legal compliance and policy impacts.

Detail

Published

23/12/2025

Key Chapter Title List

  1. Introduction
  2. Common Perceptions of Effectiveness and Targeted Killing Operations
  3. Effectiveness from a Legal Perspective: Three Dimensions
  4. Targeted Killing and Legal Compliance
  5. Effectiveness and Legality
  6. Effectiveness and Legal Paradigm Construction
  7. Concluding Observations

Document Introduction

Since the 21st century, targeted killings, kill lists, and drone strikes have become core terms in U.S. counterterrorism operations. The deliberate use of lethal force against specific security threat targets during peacetime and in conflict scenarios has sparked widespread debate in the legal and policy fields. This study focuses on two key questions: the boundaries of legality for U.S. targeted killing operations within the framework of international law, and the practical utility of these operations in achieving counterterrorism and national security objectives. By integrating legal analysis and strategic assessment, it breaks through the limitations of traditional studies that separate the two, constructing a more comprehensive cross-dimensional analytical framework.

The study first outlines the multiple dimensions for assessing the effectiveness of targeted killings, pointing out that their effects must be judged comprehensively by combining short-term and long-term impacts, military and political dimensions, domestic and international repercussions, among other factors, rather than being limited to single metrics such as the elimination of terrorist organizations or the deterrence of attacks. It questions the ambiguity in defining effectiveness, emphasizing that while it may disrupt terrorist organization operations in the short term at the tactical level, it can trigger backlash at the strategic level, or gain support in the domestic political sphere while encountering resistance in the diplomatic arena.

From the legal analysis dimension, the study systematically explores the normative constraints imposed by international human rights law, the international law of self-defense, and the law of armed conflict on targeted killing operations, focusing on the practical application of the three core principles of the law of armed conflict: distinction, proportionality, and precautions. By comparing the differences between the U.S. government and the international community, as well as human rights organizations, regarding the application of legal paradigms, it reveals the interpretative controversies arising from the dual legal bases of armed conflict and self-defense.

The study also delves into the intrinsic relationship between legality and effectiveness, noting that the legality of military operations depends not only on actual legal compliance but also on domestic and international perceptions and acceptance of that compliance. The U.S. government's attempts to enhance the perceived legality of its operations through policy framework optimization (such as the 2013 Presidential Policy Guidance) and the resulting transparency controversies and standard-setting struggles have become key variables in assessing the sustainability of its actions.

Finally, the study warns of the long-term risks posed by the confusion of legal paradigms, namely that the U.S. reliance on dual legal bases may blur the boundaries between the law of armed conflict and human rights law, affecting the future development and implementation of international law. Overall, through rigorous legal interpretation and empirical analysis, this study provides a multi-perspective reference for understanding the complex impacts of U.S. targeted killing operations, offering significant insights for national security policy formulation and the practice of international law.