Munitions &amp; Weapons Suppliers

Aerostar S.A.

Romanian aerostructures, airliner MRO, fighter upgrades and ground defence

Bacau, Romania

AeroVironment

Small drones, loitering munitions, ground robots, and space and directed-energy systems.

Arlington, USA

GPS, Navigation & TimingUnmanned & Autonomous Systems

AERTEC Solutions

Airport engineering, aircraft systems and laser-guided munitions

Malaga, Spain

Anduril Industries

Autonomous aircraft, interceptors, submarines, munitions, and AI command software.

Costa Mesa, USA

Counter-UAS & Short-Range Air DefenseUnmanned & Autonomous Systems

Apollo Micro Systems Limited

Weapon electronics for missiles, land, air, naval and space programmes.

Hyderabad, India

Aresia

Aircraft weapon carriage, ejector racks, mission pods and live-fire training systems.

Villeneuve-la-Garenne, France

Nuclear & Strategic SystemsSpace Systems

ArianeGroup

European heavy and mini launchers, France's submarine-launched deterrent, hypersonic demonstrators, space surveillance and propulsion equipment.

Issy-les-Moulineaux, France

Armaments Corporation of South Africa (Armscor)

South Africa's defence acquisition agency, test ranges, research institutes and dockyard.

Pretoria, South Africa

Naval & MaritimeCBRN Defense

Armoured Vehicles Nigam Limited

Main battle tanks, infantry vehicles, tank engines and military trucks.

Avadi, India

Naval & MaritimeCBRN Defense

Arsenal AD

Small arms, mortars, grenade launchers, ammunition and carbide tooling

Kazanlak, Bulgaria

Counter-UAS & Short-Range Air DefenseSoldier Systems & Personal Equipment

Aselsan

Radar, electronic warfare, communications, and air defense electronics.

Ankara, Turkey

Naval & MaritimeCounter-UAS & Short-Range Air Defense

ATI Inc.

Specialty materials producer of titanium, nickel superalloys, armor steels, powders, forgings and machined components for aerospace, defense, energy and medical markets.

Dallas, USA

Avibras

Brazilian rocket artillery and tactical missile house behind the ASTROS system, rebuilt through judicial recovery and restarted under new ownership.

Jacarei, Brazil

Avio S.p.A.

Space launchers, solid propulsion and tactical missile motors

Colleferro, Italy

Soldier Systems & Personal EquipmentMunitions & Weapons

B&T AG

Swiss submachine guns, precision rifles, launchers and suppressors

Thun, Switzerland

BAE Systems Bofors

Naval and land gun systems, artillery and programmable ammunition.

Karlskoga, Sweden

Naval & MaritimeCounter-UAS & Short-Range Air Defense

Barrett Firearms Manufacturing

Anti-materiel and precision rifles, suppressors, ammunition and training.

Murfreesboro, USA

Soldier Systems & Personal EquipmentMunitions & Weapons

Baykar Technologies

Armed UAVs, jet UCAVs, loitering munitions, avionics and satellites.

Istanbul, Turkey

Counter-UAS & Short-Range Air DefenseSoldier Systems & Personal Equipment

Beretta Defense Technologies

A family of Italian and European small arms, optics, and ammunition brands for military and law enforcement.

Gardone Val Trompia, Italy

Bet Shemesh Engines Ltd.

Jet engine parts, forging, casting, engine MRO and small turbojets.

Bet Shemesh, Israel

Munitions & WeaponsEnergy, Power & Microgrids

Bharat Dynamics Limited

Air defence, anti-tank, air-to-air, torpedoes, mines and countermeasures.

Hyderabad, India

Naval & MaritimeCounter-UAS & Short-Range Air Defense

Bharat Forge Limited

Forgings and castings for autos, energy and rail, plus artillery and armour.

Pune, India

Naval & MaritimeCounter-UAS & Short-Range Air Defense

BlueBird Aero Systems Ltd.

Tactical and mini UAS plus loitering munitions, half owned by IAI.

Emek Hefer, Israel

Boeing Defense, Space & Security

Fighters, rotorcraft, tankers, bombers, spacecraft, and weapons systems.

Arlington, USA

Boustead Heavy Industries Corporation Berhad

Submarine support, naval MRO, gun and radar servicing, helicopter MRO

Kuala Lumpur, Malaysia

Counter-UAS & Short-Range Air DefenseUnmanned & Autonomous Systems

Calidus LLC

Emirati light attack aircraft, 8x8 fighting vehicles and guided missiles.

Abu Dhabi, United Arab Emirates

Canik - Samsun Yurt Savunma Sanayi ve Ticaret A.S.

High volume pistols, heavy machine guns, weapon stations and optics.

Istanbul, Turkey

Counter-UAS & Short-Range Air DefenseSoldier Systems & Personal Equipment

Carpenter Technology Corporation

Specialty alloy producer covering premium melted steels, superalloys, titanium and soft magnetics, plus metal powders and additive manufacturing services.

Philadelphia, USA

Munitions & WeaponsSensors, Radar & Electro-Optics

Castelion

Low cost hypersonic strike missiles built end to end in house.

Torrance, USA

Chemring Group

Countermeasures, energetics, sensors, and electronic warfare from the UK.

Romsey, United Kingdom

CBRN DefenseCybersecurity

Chemring Nobel

Europe's largest HMX producer, plus RDX, NTO and energetic plasticisers.

Sætre, Norway

Munitions & WeaponsAdditive Manufacturing & Advanced Materials

CILAS

High energy laser weapons, laser target designators, spaceborne laser sources and large-format optical coatings and adaptive optics.

Orléans, France

Space SystemsCounter-UAS & Short-Range Air Defense

Colt Canada Corporation

Canada's small arms centre of excellence: rifles, LSW, and launchers.

Kitchener, Canada

Soldier Systems & Personal EquipmentMunitions & Weapons

Colt CZ Group SE

Small arms, ammunition and nitrocellulose energetics across six countries

Prague, Czech Republic

Soldier Systems & Personal EquipmentMunitions & Weapons

Colt's Manufacturing Company

M4 and M16 rifles, 1911 pistols, and revolvers for military, law enforcement, and civilian shooters.

West Hartford, USA

Soldier Systems & Personal EquipmentMunitions & Weapons

Companhia Brasileira de Cartuchos S.A.

Military and sporting ammunition, shotguns and air rifles.

Ribeirao Pires, Brazil

Munitions & Weapons

Compania Nationala ROMARM S.A.

Romania's state arms holding: guns, ammunition, armour and explosives

Bucharest, Romania

Soldier Systems & Personal EquipmentUnmanned & Autonomous Systems

Consolidated Nuclear Security, LLC

Management and operation of the Y-12 and Pantex nuclear weapons complex sites for NNSA.

Oak Ridge, USA

Nuclear & Strategic SystemsMunitions & Weapons

Czechoslovak Group (CSG)

Czech ammunition, armored vehicles, and small arms conglomerate.

Prague, Czech Republic

Daikin Industries, Ltd.

World's largest air conditioner maker, and Japan's sole tank round producer.

Osaka, Japan

Soldier Systems & Personal EquipmentMunitions & Weapons

Dasan Machineries Co., Ltd.

Export-focused rifles, machine guns, castings, and automotive parts.

Wanju, South Korea

Day & Zimmermann

Munitions manufacturing, ammunition plant operations, and security services for the U.S. military.

Philadelphia, USA

Munitions & WeaponsLogistics & Sustainment

Delair

Long-range fixed-wing drones for defence, infrastructure and mapping customers.

Toulouse, France

Denel SOC Ltd

South Africa's state aerospace, missile, and land systems manufacturer.

Centurion, South Africa

Counter-UAS & Short-Range Air DefenseMunitions & Weapons

Diehl Defence

German guided missiles, air defense systems, and ammunition, built around the IRIS-T family.

Überlingen, Germany

Dynamit Nobel Defence GmbH

Shoulder-fired anti-armour weapons, reactive armour, mine layers and fire protection

Burbach, Germany

Soldier Systems & Personal EquipmentMunitions & Weapons

EaglePicher Technologies

Thermal, primary, rechargeable and silver-zinc batteries plus energetic devices for missiles, munitions, spacecraft, aircraft and undersea platforms.

Joplin, USA

EDGE Group

Emirati state conglomerate spanning missiles and munitions, armoured vehicles, shipbuilding, drones, robotics, electronic warfare, cyber, space and homeland security.

Abu Dhabi, United Arab Emirates

Naval & MaritimeCounter-UAS & Short-Range Air Defense

Escribano Mechanical & Engineering

Weapon stations, electro-optics, guidance kits, EOD robots and counter-drone

Alcala de Henares, Spain

Etienne Lacroix Group

Family pyrotechnics group: countermeasures, safety, industry, logistics and fireworks.

Muret, France

Naval & MaritimeSoldier Systems & Personal Equipment

Eurenco

Explosives, propellants, charges and fuel additives for defense and civil markets.

Sorgues, France

FAMAE - Fabricas y Maestranzas del Ejercito

Chilean small arms, ammunition, armour overhaul and optronics repair.

Santiago, Chile

Ferra Engineering

Aerospace, defence and space components, assemblies and weapon adapters

Brisbane, Australia

Soldier Systems & Personal EquipmentMunitions & Weapons

Fiocchi Munizioni S.p.A.

Small calibre ammunition for defence, police, hunting and sport

Lecco, Italy

FN America

US-built machine guns, carbines, pistols, less-lethal and suppressors.

Columbia, USA

Soldier Systems & Personal EquipmentMunitions & Weapons

FN Herstal

Rifles, machine guns, sidearms, and less-lethal systems for military and law enforcement.

Herstal, Belgium

Soldier Systems & Personal EquipmentMunitions & Weapons

FNSS Savunma Sistemleri

Tracked and wheeled armoured vehicles, turrets and engineering rigs.

Ankara, Turkey

Naval & MaritimeCounter-UAS & Short-Range Air Defense

Global Industrial & Defence Solutions (GIDS)

Pakistan's state defence group: drones, missiles, naval, CBRNe, cyber

Rawalpindi, Pakistan

Glock GmbH

Polymer service pistols, magazines, field knives and entrenching tools

Deutsch-Wagram, Austria

Soldier Systems & Personal EquipmentMunitions & Weapons

Heavy Industries Taxila

Pakistan's armour house: tanks, carriers, gun barrels, rebuild, commercial engineering

Taxila, Pakistan

Soldier Systems & Personal EquipmentMunitions & Weapons

Heckler & Koch

Assault rifles, pistols, machine guns and 40 mm grenade systems

Oberndorf am Neckar, Germany

Soldier Systems & Personal EquipmentMunitions & Weapons

Hellenic Defence Systems S.A. (EAS)

Greece's state arms and ammunition maker: guns, rounds, missile work, vehicles

Athens, Greece

Counter-UAS & Short-Range Air DefenseSoldier Systems & Personal Equipment

Helsing GmbH

Defence AI software plus strike drones, combat jets and undersea gliders

Munich, Germany

Hexcel Corporation

Advanced composites producer supplying aerospace carbon fibre, prepregs, honeycomb, adhesives and RF absorbing materials across more than 100 defense and space programs.

Stamford, USA

Hirtenberger Defence Systems

Complete 60, 81 and 120 mm mortar systems, ammunition and fire control

Hirtenberg, Austria

Soldier Systems & Personal EquipmentMunitions & Weapons

Howa Machinery, Ltd.

JSDF service rifle maker that also builds machine tools and flood doors.

Kiyosu, Japan

HS Produkt d.o.o.

Croatian pistols, bullpup rifles and soldier weapon systems

Ozalj, Croatia

Soldier Systems & Personal EquipmentMunitions & Weapons

Huta Stalowa Wola S.A.

Polish howitzers, mortars, IFVs, minelayers, gun barrels and buses

Stalowa Wola, Poland

Naval & MaritimeCounter-UAS & Short-Range Air Defense

HYUNDAI WIA Corporation

Large calibre guns, naval mounts, machine tools, and EV driveline parts.

Changwon, South Korea

IMBEL - Industria de Material Belico do Brasil

Rifles, pistols, artillery ammunition, propellants and tactical radios.

Brasilia, Brazil

Soldier Systems & Personal EquipmentMunitions & Weapons

Instalaza

Shoulder-launched rocket systems, sights, grenades and infantry propulsion

Zaragoza, Spain

Soldier Systems & Personal EquipmentMunitions & Weapons

International Golden Group (IGG)

Emirati defence procurement, integration, manufacturing and in-service support.

Abu Dhabi, United Arab Emirates

Naval & MaritimeSoldier Systems & Personal Equipment

Israel Weapon Industries Ltd. (IWI)

Rifles, machine guns, pistols and computerised fire control.

Kiryat Gat, Israel

Counter-UAS & Short-Range Air DefenseSoldier Systems & Personal Equipment

John Cockerill Defense

Vehicle turrets, wheeled combat vehicles, simulators and site security

Seraing, Belgium

Counter-UAS & Short-Range Air DefenseMunitions & Weapons

Jordan Design and Development Bureau (JODDB)

Jordan's defence design house, manufacturing group and industrial free zone.

Amman, Jordan

Counter-UAS & Short-Range Air DefenseSoldier Systems & Personal Equipment

Karman Holdings Inc. (Karman Space & Defense)

Fairings, interstages, motor cases and energetics for missiles, launchers and hypersonics.

Huntington Beach, USA

KNDS Deutschland

German maker of the Leopard 2 tank, PzH 2000 howitzer, and Puma infantry vehicle.

Munich, Germany

Counter-UAS & Short-Range Air DefenseMunitions & Weapons

KNDS France

France's armored vehicle and artillery maker, half of the Franco-German KNDS group.

Versailles, France

Knight's Armament Company

Sniper rifles, machine guns, suppressors, rails and night vision optics.

Titusville, USA

Soldier Systems & Personal EquipmentMunitions & Weapons

KONSTRUKTA - Defence, a.s.

Slovak self-propelled artillery, mortars, fire control and ammunition design

Dubnica nad Vahom, Slovakia

Larsen & Toubro Defence

Artillery, armored platforms, warships, and precision missile systems for India's armed forces.

Mumbai, India

Naval & MaritimeCounter-UAS & Short-Range Air Defense

Luch Design Bureau

Ukraine's precision weapons house: anti tank, air, naval missiles and test gear

Kyiv, Ukraine

Mach Industries

Strike drones, interceptors, high altitude craft, engines, energetics.

Huntington Beach, USA

Naval & MaritimeCounter-UAS & Short-Range Air Defense

Magellan Aerospace Corporation

Engine parts, airframes, sounding rockets, satellite buses, and MRO.

Mississauga, Canada

Marand Precision Engineering

F-35 tails and trailers, missile launchers, Boxer work and rail machines

Moorabbin, Australia

MBDA

Air, land, and sea missile systems across five European nations.

Le Plessis-Robinson, France

Soldier Systems & Personal EquipmentMunitions & Weapons

Meprolight (1990) Ltd.

Reflex and magnified optics, tritium sights and thermal weapon sights.

Or Akiva, Israel

MESKO S.A.

Polish missiles, rockets and ammunition from small arms up to 155 mm.

Skarzysko-Kamienna, Poland

Counter-UAS & Short-Range Air DefenseMunitions & Weapons

Milkor (Pty) Ltd

Grenade launchers, MALE unmanned aircraft, patrol boats and armoured vehicles.

Centurion, South Africa

Naval & MaritimeCybersecurity

MKE - Makina ve Kimya Endustrisi A.S.

Turkey's state arsenal: small arms, artillery, ammunition and explosives.

Ankara, Turkey

Counter-UAS & Short-Range Air DefenseCBRN Defense

MSI-Defence Systems

Naval gun mounts, remote weapon stations and short range air defence

Norwich, United Kingdom

Naval & MaritimeCounter-UAS & Short-Range Air Defense

Munitions India Limited

India's state ammunition house: small, medium and large calibre plus rockets.

Pune, India

Nammo

Ammunition, rocket motors, and shoulder-launched weapons from small caliber to space.

Raufoss, Norway

Naval & MaritimeCybersecurity

National Chung-Shan Institute of Science and Technology

Taiwan's state research institute for missiles, air defence, unmanned systems, radar and electro-optics, military communications and naval and chemical systems.

Taoyuan, Taiwan

NIOA

Family-owned munitions group spanning artillery and mortar manufacture, weapons and ordnance distribution, sustainment and missile capability development.

Brisbane, Australia

Munitions & WeaponsLogistics & Sustainment

Olin Winchester

Sporting, law enforcement and military small calibre ammunition.

East Alton, USA

Otokar Otomotiv ve Savunma Sanayi

Armoured vehicles, turret systems, unmanned platforms, buses and trucks.

Sakarya, Turkey

Patria

Armored vehicles, mortar systems, aircraft MRO, and defense electronics.

Helsinki, Finland

Naval & MaritimeCounter-UAS & Short-Range Air Defense

Polska Grupa Zbrojeniowa (PGZ)

Poland's state defense holding, spanning land, air, naval, and munitions.

Radom, Poland

Poongsan Corporation

South Korean ammunition manufacturer and copper alloy producer.

Seoul, South Korea

Munitions & Weapons

PT Dirgantara Indonesia (Persero)

Turboprops, helicopters, aerostructures, engine MRO and mission systems

Bandung, Indonesia

Soldier Systems & Personal EquipmentMunitions & Weapons

PT Pindad (Persero)

Indonesian state-owned manufacturer of small arms and ammunition, armoured wheeled vehicles and medium tanks, alongside a substantial industrial products business.

Bandung, Indonesia

Rafael Advanced Defense Systems

Air defense, precision missiles, active protection, and naval systems from Israel's state-owned developer.

Haifa, Israel

Counter-UAS & Short-Range Air DefenseMunitions & Weapons

Repkon Makine ve Kalip Sanayi ve Ticaret A.S.

Flow forming machinery, turnkey munitions plants and its own weapons line.

Istanbul, Turkey

Naval & MaritimeCounter-UAS & Short-Range Air Defense

Rheinmetall AG

Armored vehicles, artillery ammunition, air defense, and naval systems for European rearmament.

Düsseldorf, Germany

Rheinmetall Air Defence AG

Oerlikon cannon, airburst ammunition and ground and naval air defence systems

Zurich, Switzerland

Naval & MaritimeCounter-UAS & Short-Range Air Defense

Rheinmetall BAE Systems Land (RBSL)

UK combat vehicle design, manufacture and in service support at Telford

Telford, United Kingdom

Rheinmetall Denel Munition

Artillery, mortar, infantry and naval ammunition, propellants and plant engineering.

Somerset West, South Africa

Rheinmetall Expal Munitions

Spanish artillery and mortar ammunition, fuzes, mortar systems and demilitarisation

Madrid, Spain

Naval & MaritimeCounter-UAS & Short-Range Air Defense

Roketsan

Guided missiles, rockets, torpedoes, and precision munitions from Turkey.

Ankara, Turkey

RWM Italia S.p.A.

Sea mines, aircraft bombs, warheads and loitering munitions

Ghedi, Italy

Saab AB

Fighter jets, guided missiles, submarines, and battlefield sensors from Sweden.

Stockholm, Sweden

SAES - Sociedad Anonima de Electronica Submarina

Submarine acoustics, sonar, ASW, naval mines and signature measurement

Cartagena, Spain

Soldier Systems & Personal EquipmentMunitions & Weapons

Sako Ltd

Finnish precision rifles and ammunition for armies, hunters and sport shooters.

Riihimäki, Finland

Santa Barbara Sistemas

Spain's tracked and wheeled armour, gun barrels, ammunition and small arms

Madrid, Spain

Soldier Systems & Personal EquipmentUnmanned & Autonomous Systems

Sarsilmaz Silah Sanayi A.S.

Pistols, infantry rifles, machine guns, sporting arms and armed robots.

Duzce, Turkey

Saudi Arabian Military Industries

Saudi state defence group covering aerospace, land systems, naval, weapons and missiles, and defence electronics.

Riyadh, Saudi Arabia

Nuclear & Strategic SystemsNaval & Maritime

Sheffield Forgemasters

Very large steel castings and forgings for submarines, nuclear and heavy industry

Sheffield, United Kingdom

SIG SAUER Inc.

Firearms, ammunition, optics, suppressors, airguns and weapon stations.

Newington, USA

Soldier Systems & Personal EquipmentMunitions & Weapons

Smart Shooter Ltd.

AI fire control for rifles, remote weapon stations and armed drones.

Yagur, Israel

Counter-UAS & Short-Range Air DefenseSoldier Systems & Personal Equipment

SNT Dynamics Co., Ltd.

Tracked vehicle transmissions, autocannon, truck axles and gear cutting machines.

Changwon, South Korea

Naval & MaritimeCounter-UAS & Short-Range Air Defense

SNT Motiv Co., Ltd.

Korean service small arms plus EV motors, chassis, and airbags.

Busan, South Korea

Soldier Systems & Personal EquipmentMunitions & Weapons

Solar Industries India Limited

Commercial explosives, detonators, propellants, ammunition and loitering munitions

Nagpur, India

Counter-UAS & Short-Range Air DefenseUnmanned & Autonomous Systems

Steadicopter Ltd.

Unmanned helicopters for maritime, ISTAR and armed rotary missions.

Migdal HaEmek, Israel

Soldier Systems & Personal EquipmentMunitions & Weapons

Steyr Arms GmbH

Bullpup rifles, sniper systems, hunting rifles, pistols, suppressors

Kleinraming, Austria

STM Savunma Teknolojileri Muhendislik ve Ticaret

Warship design, submarines, loitering munitions, cyber and consultancy.

Ankara, Turkey

Soldier Systems & Personal EquipmentUnmanned & Autonomous Systems

STV GROUP a.s.

Czech large-calibre ammunition, explosives, armour rebuilds and firearms.

Prague, Czech Republic

Sumitomo Heavy Industries, Ltd.

Industrial machinery group with a shrinking Japanese small arms line.

Tokyo, Japan

Supashock

Military running gear, load handling and motorsport suspension

Adelaide, Australia

Soldier Systems & Personal EquipmentMunitions & Weapons

Taurus Armas S.A.

Handguns, long guns, body armour, helmets and metal injection moulding.

Sao Leopoldo, Brazil

The Japan Steel Works, Ltd.

Japan's only gun foundry, plus reactor forgings and plastics machinery.

Tokyo, Japan

Soldier Systems & Personal EquipmentMunitions & Weapons

The Kinetic Group

Federal, CCI, Speer, Remington, HEVI, Fiocchi and B&P ammunition under CSG ownership.

Anoka, USA

Turgis Gaillard

French MALE drones, rocket artillery, ISR pods and military industrial services.

Neuilly-sur-Seine, France

TUSAS Engine Industries (TEI)

Turboshafts, turbofans, turbojets, aero engine parts and engine MRO.

Eskisehir, Turkey

Counter-UAS & Short-Range Air DefenseSoldier Systems & Personal Equipment

Ukrainian Armor

Ukrainian private manufacturer of armoured wheeled vehicles, mortars and ammunition, and personal ballistic protection.

Kyiv, Ukraine

Ukrainian Defense Industry JSC (Ukroboronprom)

Ukraine's state arms holding: armour, missiles, ammunition, aircraft, ships, radar

Kyiv, Ukraine

Naval & MaritimeCounter-UAS & Short-Range Air Defense

Ultra Electronics

Sonar, sonobuoys, intelligence systems, and precision missile actuation.

Greenford, United Kingdom

Ursa Major Technologies

Liquid rocket engines, solid motors and satellite propulsion.

Berthoud, USA

UVision Air Ltd.

Loitering munitions from three kilograms to 125, plus their launchers.

Emek Hefer, Israel

Velo3D, Inc.

US metal additive manufacturer combining support-free laser powder bed fusion machines, process software and contract production for defense, space and energy parts.

Fremont, USA

Voyager Technologies

Defense electronics, propulsion, and space infrastructure, including the Starlab space station.

Denver, USA

Naval & MaritimeSoldier Systems & Personal Equipment

WB Group

Drones, loitering munitions, battlefield C4I, radios, weapon stations

Ozarow Mazowiecki, Poland

Weibel Scientific A/S

Danish Doppler radar specialist covering weapon instrumentation, air defence and counter-drone tracking, ballistic missile defence and space object surveillance.

Allerod, Denmark

Space SystemsCounter-UAS & Short-Range Air Defense

Wojskowe Zaklady Lotnicze Nr 2 S.A.

Polish military aircraft depot maintenance, engine overhaul and unmanned systems.

Bydgoszcz, Poland

X-Bow Systems

Printed solid propellant, rocket motors, composites and flight test.

Albuquerque, USA

Counter-UAS & Short-Range Air DefenseSoldier Systems & Personal Equipment

XTEND AI Robotics, Inc.

Human-guided combat drones and the operating system that flies them.

Tampa, USA

Yugoimport SDPR

Serbia's state arms house: artillery, armoured vehicles, ammunition, trainer aircraft, drones, guided weapons and patrol boats, plus the country's arms export channel.

Belgrade, Serbia