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Nigeria
Practice Relating to Rule 15. The Principle of Precautions in Attack
Section B. Avoidance or minimization of incidental damage
Nigeria’s Military Manual (1994) states: “Precaution shall be taken to minimise civilian casualties and damage.” 
Nigeria, International Humanitarian Law (IHL), Directorate of Legal Services, Nigerian Army, 1994, p. 45, § 16(b).