Making animals more aggressive through genetic modification and using them for military purposes may have a certain scientific basis in theory, but in practice it faces many technical, ethical and legal challenges. ### Science and Technology 1. **Gene Editing Technology**: Current gene editing technologies, such as CRISPR-Cas9, have been able to modify the genes of animals to a certain extent to affect their behavior. However, behavior is the result of the combined action of multiple genes and multiple factors, and there is still great uncertainty in significantly changing the aggressiveness of animals simply through genetic modification. 2. **Complexity and Unpredictability**: Behavior is affected by many factors, including the interaction of environment, learning and genes. Genetic modification may cause unforeseen side effects, affecting the overall health of animals and the balance of ecosystems. ### Ethics and Law 1. **Animal Welfare**: Deliberately enhancing the aggressiveness of animals may cause animals to suffer greater pain and stress, which is contrary to the ethical principle of animal welfare protection. 2. **International Regulations**: Many countries and international organizations have strict restrictions and prohibitions on the development and use of biological weapons. For example, the Biological Weapons Convention prohibits the development, production and stockpiling of biological weapons, including the use of biological or biological products for attacks. 3. **Ethical issues**: The use of animals for military purposes involves serious ethical issues, including violations of animal rights and potential damage to ecosystems. ### Feasibility of practical applications Even if it is technically feasible, enhancing the aggressiveness of animals for military use through genetic modification will face many obstacles in practical applications, such as difficulty in control, unpredictable consequences, and strong opposition from the international community. Therefore, from an ethical, legal, and practical point of view, the feasibility of such applications is very low. ### Summary Although gene editing technology is constantly developing, using it to enhance the aggressiveness of animals and apply it to military purposes is technically highly uncertain, and there are also major ethical and legal obstacles. The international community generally opposes the use of biotechnology to create biological weapons. Any such attempt is not only unethical, but may also bring serious legal consequences and global security risks.