PSEB SS Defence Studies cheat sheet

Defence Studies is an interdisciplinary field drawing on political science, international relations, military history, geography, economics and technology; it examines how states organise, employ and limit armed force.

Key distinction: 'defence' denotes protection of the state against external threat, while 'security' is broader, covering economic, environmental, societal and political dimensions (the widened security agenda).

Levels of analysis used in the subject: individual, state (national), regional and systemic/international; explanations of war and peace differ by level chosen.

Strategic Studies is the sub-field concerned with the relationship of military means to political ends; Defence Studies additionally covers organisation, administration, logistics and civil-military relations.

Classical strategic thought anchors: Kautilya's Arthashastra (statecraft, intelligence, four-fold strategy of conciliation, gifts, dissension, force); Sun Tzu on deception and economy of effort; Clausewitz on war as continuation of policy and the trinity of government, army and people.

Civil-military relations concepts: civilian supremacy over the military, professionalisation, and the cost of praetorianism (military interference in politics).

Defence economics covers defence budgeting, opportunity cost of military spending, defence-industrial self-reliance, offsets and arms procurement ethics.

Sources of the discipline: primary documents (treaties, white papers, defence budgets), memoirs, archival records, and peer-reviewed strategic journals; distinguish evidence from opinion.

Clausewitz's formula: war is an act of force to compel the adversary to fulfil our will; the 'remarkable trinity' links primordial violence (people), chance and creativity (army/commander) and political reason (government).

Types of war by scale and character: total vs limited war; conventional vs unconventional (guerrilla, insurgency, terrorism); symmetric vs asymmetric; intra-state vs inter-state; hybrid war combines regular and irregular means plus information operations.

Causes of war frameworks: human nature, state-level factors (regime type, nationalism, misperception), and systemic factors (anarchy, security dilemma, balance of power, power transition).

Deterrence logic: capability + credibility + communication; deterrence by punishment vs deterrence by denial; extended deterrence and the credibility problem; compellence is the offensive counterpart.

Nuclear deterrence concepts: assured retaliation, second-strike capability, mutually assured destruction, counterforce vs countervalue targeting, and the stability-instability paradox.

Revolution in Military Affairs (RMA): precision-guided munitions, stealth, C4ISR integration and network-centric warfare change force structure and tempo; information warfare targets decision cycles (OODA loop).

Insurgency and counterinsurgency: insurgents seek legitimacy and population support; counterinsurgency doctrine stresses clear political aim, population protection, intelligence and unity of effort; guerrilla warfare avoids decisive battle.

Conflict resolution tools: negotiation, mediation, arbitration, adjudication, peacekeeping, peace enforcement and peacebuilding; distinguish negative peace (absence of violence) from positive peace (structural harmony).

Levels of intensity ladder: peace, crisis, limited hostilities, general war, and de-escalation; escalation dominance and thresholds (nuclear, chemical, cyber) shape crisis behaviour.

India's supreme command authority rests with the President as Supreme Commander; the civilian defence minister heads the Ministry of Defence, and the Chief of Defence Staff (created 2019) is principal military adviser and heads the Department of Military Affairs.

Service structure: Indian Army (land), Indian Navy (maritime; includes naval aviation and submarine arm), Indian Air Force (air and space), with coast guard and paramilitary forces (BSF, CRPF, ITBP, SSB, Assam Rifles) under other ministries.

Rank hierarchy (officer level, all services): Lieutenant/Sub-Lieutenant/Flying Officer up to General/Admiral/Air Chief Marshal; the highest rank in the Army is Field Marshal (honorary/wartime).

Theatre command debate: jointness through Integrated Defence Staff, Andaman and Nicobar Command (India's first tri-service command) and proposed theatre commands; aim is unity of effort and reduced duplication.

Defence R&D and production: DRDO (research), Ordnance Factory Board restructuring into seven DPSUs (2021), HAL, BEL and shipyards; 'Make in India' and positive indigenisation lists aim at self-reliance.

Nuclear doctrine (declared 2003): no first use, credible minimum deterrence, massive retaliation, civilian control through the Nuclear Command Authority; India is not an NPT member but observes IAEA safeguards on civil facilities.

Budget and manpower: defence budget is a major share of central government expenditure; pension and salary costs consume a large portion, constraining modernisation capital outlay.

Intelligence and internal security architecture: NIA, IB, R&AW, NSG (counter-terror), and the role of the National Security Council and National Security Adviser.

UN Charter core rules: Article 2(4) prohibits threat or use of force; Article 51 recognises inherent right of individual and collective self-defence; Chapter VII empowers the Security Council to authorise enforcement action.

Use-of-force exceptions recognised in practice: self-defence (including anticipatory in limited circumstances), Security Council authorisation, and consent of the host state; humanitarian intervention remains contested.

Law of Armed Conflict principles: distinction (military vs civilian objects), proportionality (expected civilian harm not excessive relative to military advantage), military necessity, and humanity; 'jus ad bellum' governs resort to force, 'jus in bello' governs conduct.

Geneva Conventions (1949) and Additional Protocols (1977) protect wounded, shipwrecked, prisoners of war and civilians; grave breaches are war crimes; the ICC exercises jurisdiction over genocide, war crimes, crimes against humanity and aggression.

Disarmament and arms control instruments: NPT (1968), CTBT (not in force), Chemical Weapons Convention, Biological Weapons Convention, Missile Technology Control Regime, Wassenaar Arrangement, and the Ottawa Convention banning anti-personnel mines.

India's position: supports universal, non-discriminatory, verifiable disarmament; opposes discriminatory regimes; maintains credible minimum deterrence; participates in export-control regimes such as MTCR, Wassenaar and Australia Group.

Collective security vs collective defence: UN is the collective security model (against any aggressor); NATO is collective defence (Article 5, attack on one is attack on all).

Regional and global organisations relevant to India: SAARC, BIMSTEC, SCO, QUAD, IORA, ASEAN Defence Ministers' Meeting-Plus, and UN peacekeeping (India is among the largest troop contributors historically).