The aim of the present brochure is to provide managers of business enterprises with a simple basic document flagging situations where business operations may either benefit from the protections afforded by international humanitarian law or be constrained by its rules. The brochure is meant primarily for a readership of country managers and security managers who face the daily challenge of running business operations in conflict environments. It may also serve as a reference for financial, insurance and trading companies which are not directly operating in zones of armed conflict themselves, but may do so indirectly through their clients and suppliers.... The International Committee of the Red Cross (ICRC) hopes that this brochure will prove a useful introduction to the complex and under-explored issue of the relationship between business and international humanitarian law. It is convinced that by clarifying the relevant aspects of international humanitarian law for business enterprises whose activities are connected in one way or another with armed conflict, this brochure will help them develop business operations that, at a minimum, respect and do no harm to people affected by conflict.