An unlawful combatant, illegal combatant or unprivileged combatant/belligerent is a person who directly engages in armed conflict in violation of the laws of war and therefore is claimed not to be protected by the Geneva Conventions.
The International Committee of the Red Cross points out that the terms "unlawful combatant", "illegal combatant" or "unprivileged combatant/belligerent" are not defined in any international agreements. While the concept of an unlawful combatant is included in the Third Geneva Convention, the phrase itself does not appear in the document. Article 4 of the Third Geneva Convention does describe categories under which a person may be entitled to prisoner of war status. There are other international treaties that deny lawful combatant status for mercenaries and children.
Capture of a Franc-Tireur, by Carl Johann Lasch.
Camp X-Ray, Guantánamo.
The law of war is the component of international law that regulates the conditions for initiating war and the conduct of hostilities. Laws of war define sovereignty and nationhood, states and territories, occupation, and other critical terms of law.
The First Geneva Convention governing the sick and wounded members of armed forces was signed in 1864.
The signing of the First Geneva Convention by some of the major European powers in 1864.
An 1904 article outlining the basic principles of the law of war, as published in the Tacoma Times.