International Humanitarian Law (IHL) is a body of rules that seeks to limit the effects of armed conflict by protecting persons who are not participating in hostilities and by restricting means and methods of warfare. Though IHL is formally a matter of international law rather than domestic Indian law, India is a signatory to the Geneva Conventions and related Protocols, and Indian courts have increasingly recognized IHL principles in judicial reasoning. The statutory basis in Indian domestic law is oblique: the Constitution of India, particularly Article 51, mandates that India shall endeavour to promote international peace and security and respect for international law; the Indian Penal Code of 1860 contains provisions against waging war and committing acts of violence during armed conflict; and various statutes implementing international treaties give effect to IHL obligations. However, unlike contract law or tort law, there is no single unified code in India that codifies IHL. Rather, India's approach involves treaty adherence, incorporation through statutory amendment, and judicial recognition of IHL as customary international law binding upon the nation. The core elements of IHL interact as a layered framework. The principle of distinction requires that parties to an armed conflict must distinguish at all times between combatants (legitimate military targets) and civilians (protected persons). This is foundational: one cannot lawfully attack civilians merely because they provide logistical support or occupy territory. The principle of proportionality then operates as a secondary filter: even when attacking a legitimate military target, the anticipated civilian harm must not be excessive in relation to the concrete military advantage gained. Military necessity is not a licence for unlimited violence; it permits only force that is actually needed to achieve a lawful military objective. These three principles together create a hierarchy: first, identify whether the target is lawful; second, assess whether the anticipated civilian cost is proportionate; third, confirm that no less harmful method exists. Humane treatment of prisoners of war and detained persons operates independently as a floor of dignity that applies regardless of the military situation. A commander cannot kill wounded prisoners because doing so serves military necessity; once a combatant is hors de combat (out of action), protection attaches immediately. The legal consequences of violating IHL are manifold and operate at multiple levels. At the international plane, a state that systematically violates IHL may face condemnation by the United Nations, sanctions, and referral to the International Criminal Court for investigation of war crimes, crimes against humanity, or genocide. At the domestic Indian level, individuals—both military personnel and civilians—who commit grave breaches of the Geneva Conventions can be prosecuted under Indian law. The Indian Penal Code provisions against waging war (dealing with hostile acts during armed conflict) and criminal intimidation or harm serve as the prosecutorial foundation. Remedies are primarily criminal: imprisonment, fines, and disqualification from public office. Civil remedies (damages claims) are theoretically available but are rarely pursued during active conflict due to sovereign immunity doctrines and practical enforcement barriers. Defences are narrow. A military commander cannot rely on superior orders as a complete defence if the order was manifestly illegal (such as an order to execute all prisoners). Necessity itself is not a defence to a grave breach; a soldier cannot bomb a hospital merely because it lies between his unit and an enemy position and the detour would cost him time. The defence of mistake of fact is available only if genuinely and reasonably held, not if the soldier was reckless or negligent in identifying the target. IHL occupies a unique position in the broader Indian legal landscape. It is neither purely constitutional law, nor criminal law, nor private law; rather, it forms a specialized field at the intersection of constitutional mandate (India's commitment to international peace), criminal responsibility (individual accountability for war crimes), and international relations (state-to-state obligations). Neighbouring concepts with which IHL is often confused include the law of armed conflict (which is essentially synonymous with IHL), the law of neutrality (which governs the conduct of non-belligerent states), and human rights law (which applies in peacetime and is often narrower in scope during conflict, though core protections remain). However, modern IHL has converged with human rights law in many respects: the right to life, freedom from torture, and fair trial protections apply both in peace and in armed conflict, creating overlapping regimes. The distinction is that IHL is specifically designed for the exigencies of warfare and reflects a balance between military necessity and humanitarian protection, whereas human rights law operates from a premise of absolute respect for dignity regardless of context. Another important neighbour is the law of neutrality and diplomatic immunity, which protects non-combatant states and their representatives; however, this is formally separate from IHL proper. Within Indian jurisprudence, courts have drawn upon IHL principles when interpreting the right to life under Article 21 of the Constitution, suggesting that IHL serves as an interpretive aid for fundamental rights in the context of armed conflict. CLAT examiners frequently distort IHL principles in three characteristic ways. First, they may present a scenario where military necessity is invoked after the fact to justify a clearly disproportionate attack—for example, a military commander drops a bomb on a civilian neighbourhood to destroy a single militant hideout, killing 200 civilians for one confirmed military target—and ask whether military necessity provides a defence. The trap is that candidates often conflate military necessity (which requires a genuine, immediate operational need) with strategic advantage (which does not justify grave breaches). Second, examiners reverse roles to create moral ambiguity: they describe a non-state armed group that claims to operate under IHL principles and ask whether they are bound by the same rules as state armed forces. The technical answer is subtle—non-state armed groups are bound by IHL when they exercise territorial control or conduct sustained operations, but the examination rarely rewards this nuance and instead tests whether candidates assume all belligerents have equal standing. Third, examiners conflate the protection of prisoners with the protection of detained civilians: a scenario might describe a detained militant who is not a prisoner of war (because he belongs to a non-state group lacking formal military structure) and ask whether all the prisoner-of-war protections apply. The trap is that candidates fail to distinguish between combatant status (which determines treatment) and the baseline humane treatment that applies to all persons in custody. Fourth, examiners often present a fact pattern where distinction is theoretically possible but practically difficult—for instance, soldiers enter a town where militants hide among civilians and wear no uniform—and ask whether bombing the entire town is justified by military necessity. Candidates often assume that practical difficulty excuses the duty to distinguish, when in fact it merely makes compliance harder; the legal obligation remains absolute. Fifth, a common scope-creep distraction involves importing terrorism law or counter-insurgency doctrine into IHL analysis, suggesting that non-combatant support for militants removes civilian protection—a fundamental misunderstanding, as mere sympathy or logistical support does not transform a civilian into a lawful target.