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Côte d’Ivoire
Practice Relating to Rule 14. Proportionality in Attack
Côte d’Ivoire’s Teaching Manual (2007) provides in Book I (Basic instruction):
II.2 Principles of the Law of War
The Law of War is based on three fundamental principles:
- The principle of distinction;
- The principle of limitation;
- The principle of proportionality.
The principle of proportionality demands the fulfilment of one’s mission without causing unnecessary damage. It entails the adaptation of the means of combat to the military result anticipated. Recourse to excessive force is a flagrant violation of international humanitarian law. 
Côte d’Ivoire, Droit de la guerre, Manuel d’instruction, Livre I: Instruction de base, Ministère de la Défense, Forces Armées Nationales, November 2007, pp. 14 and 16.
In Book III, Volume 1 (Instruction of first-year trainee officers), the Teaching Manual provides:
II. The fundamental principles of IHL
Just as military operations are based on principles concerning attack, defence, withdrawal, etc., the law of armed conflicts contains a set of well-defined principles. These concrete principles reflect the realities of conflicts. They represent a balance between the principle of humanity and military necessity, and they are valid at all times, in all places, and in all circumstances. It is essential that these rules are known by all combatants. They must permanently be taken into consideration in every activity of assessment, planning, and military training or operation. The following principles can be found throughout the texts of the law of armed conflicts.
II.2. Proportionality
When military objectives are attacked, civilians and civilian objects must to the greatest extent practicable be protected against any incidental or collateral damage. Incidental damage caused must not be excessive in relation to the operation’s direct and concrete military advantage anticipated. Excessive recourse to force constitutes a flagrant violation of the law of armed conflicts.
Here we are addressing fundamental military demands, especially for commanders. Avoiding an infringement of this principle requires constant reflection and effort. Deficiencies in the area of preparation, intelligence or command can easily lead to the destruction of a town or village with its hospitals, religious buildings and its civilian population. 
Côte d’Ivoire, Droit de la guerre, Manuel d’instruction, Livre III, Tome 1: Instruction de l’élève officier d’active de 1ère année, Manuel de l’élève, Ministère de la Défense, Forces Armées Nationales, November 2007, pp. 12–13; see also Droit de la guerre, Manuel d’instruction, Livre III, Tome 2: Instruction de l’élève officier d’active de 2ème année, Manuel de l’instructeur, Ministère de la Défense, Forces Armées Nationales, November 2007, pp. 13–14; Droit de la guerre, Manuel d’instruction, Livre IV: Instruction du chef de section et du commandant de compagnie, Manuel de l’élève, Ministère de la Défense, Forces Armées Nationales, November 2007, p. 13.
In Book IV (Instruction of heads of division and company commanders), the Teaching Manual provides:
The fact that an attack launched against a legitimate objective can cause losses among civilians or damage to civilian objects does not necessarily render the attack illegitimate in the sense of the LOAC. However, these collateral damages must not be excessive in relation to the concrete and direct military advantage anticipated at the moment of the attack. 
Côte d’Ivoire, Droit de la guerre, Manuel d’instruction, Livre IV: Instruction du chef de section et du commandant de compagnie, Manuel de l’élève, Ministère de la Défense, Forces Armées Nationales, November 2007, p. 28; see also p. 50.
Côte d’Ivoire’s Teaching Manual (2007) provides in Book IV (Instruction of heads of division and company commanders):
The military advantage at the moment of attack is the advantage anticipated from the operation or from the military campaign of which the attack is a part, considered as a whole, and not only from isolated or particular parts of that campaign or that operation.
There is a concrete and direct military advantage if the commander reasonably and honestly anticipates that the attack contributes to the success of the operation as a whole. 
Côte d’Ivoire, Droit de la guerre, Manuel d’instruction, Livre IV: Instruction du chef de section et du commandant de compagnie, Manuel de l’élève, Ministère de la Défense, Forces Armées Nationales, November 2007, p. 27.