Practice Relating to Rule 19. Control during the Execution of Attacks
Cameroon’s Instructor’s Manual (1992) states:
An attack shall be cancelled or suspended if it becomes apparent that the objective is not a military one or subject to special protection or that the attack may be expected to cause incidental loss of civilian life, injury to civilians, damage to civilian objects, or a combination thereof, which would be excessive in relation to the concrete and direct military advantage anticipated.
Cameroon’s Instructor’s Manual (2006), under the heading “Regulations regarding the Means and Methods of Attack”, states: “Suspension of an attack.
An attack against an objective which initially appeared to be military in nature, but which is [subsequently found to be] non-military, must be suspended.”
The manual continues by quoting Article 57(2)(b) of the 1977 Additional Protocol I on the cancellation of attacks.