The document discusses the definitions and sources of international humanitarian law (IHL), also known as the laws of war. It explains that IHL aims to limit suffering and protect civilians during armed conflicts by establishing rules for combatants and military objectives. The main sources of IHL are lawmaking treaties like the Geneva and Hague Conventions, as well as customary international law. The document outlines the key purposes and applicability of IHL, and consequences for violating its provisions.