In 1977, Protocol I was adopted as an amendment to the Geneva Conventions, prohibiting the deliberate or indiscriminate attack of civilians and civilian objects, even if the area contained military objectives, and the attacking force must take precautions and steps to spare the lives of civilians and civilian objects as possible.

Protocol I (also Additional Protocol I and AP I) is a 1977 amendment protocol to the Geneva Conventions concerning the protection of civilian victims of international war, including "armed conflicts in which peoples are fighting against colonial domination, alien occupation or racist regimes". In practice, Additional Protocol I updated and reaffirmed the international laws of war stipulated in the Geneva Conventions of 1949 to accommodate developments of warfare since the Second World War (1937–1945).