This is a list of cancelled military projects.

Argentina

Fuerza Aérea Argentina

Australia

Royal Australian Navy

Australian Army

Royal Australian Air Force

Brazil

Exército Brasileiro

Brazilian Air Force

Canada

Pre-Unification

Canadian Army

Royal Canadian Air Force

Fighters

Missiles

Royal Canadian Navy

Canadian Forces

Land Forces

Czechoslovakia/Czech Republic

Vzdušné síly Armády

Egypt

Egyptian Air Force

France

French Army

French Navy

French Air Force

Germany

Military of the German Empire

Imperial German Navy

Wehrmacht

Heer

Kriegsmarine

Luftwaffe

Other

Bundeswehr

German Army

German Air Force

India

Indian Air Force

Iraq

Israel

Israel Defense Forces

Aviation

Italy

Regia Marina/Italian Navy

Regia Aeronautica/Italian Air Force

Other

Japan

Imperial Japanese Armed Forces

Imperial Japanese Navy

Pakistan

Pakistan Air Force

Poland

Polish Air Force

Polish Navy

Romania

Romanian Air Force

Other

Russia/Soviet Union

Soviet Armed Forces

Red Army/Soviet Army

Soviet Navy

Strategic Rocket Forces

Soviet Air Force

Russian Armed Forces

Russian Ground Forces

Russian Air Forces

South Korea

Sweden

Swedish Air Force

Other

United Kingdom

British Army

Royal Air Force

Royal Navy

United States

United States Army Air Corps

Bombers

Fighters

United States Army Air Forces

Bombers

Fighters

United States Air Force

Bombers

Fighters

Other

United States Navy/United States Marine Corps

Attack Aircraft

Fighters

Rotorcraft

Ships

United States Army

Small arms

Armor

Artillery

Aviation

Other

United States Department of Defense

Yugoslavia

Yugoslav Air Force