The Imperial War Cabinet was created by British

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

 Prime Minister

Prime Minister of the United Kingdom

The Prime Minister of the United Kingdom of Great Britain and Northern Ireland is the Head of Her Majesty's Government in the United Kingdom. The Prime Minister and Cabinet are collectively accountable for their policies and actions to the Sovereign, to Parliament, to their political party and...

 David Lloyd George

David Lloyd George

David Lloyd George, 1st Earl Lloyd-George of Dwyfor OM, PC was a British Liberal politician and statesman...

 in the spring of 1917 as a means of co-ordinating the British Empire

British Empire

The British Empire comprised the dominions, colonies, protectorates, mandates and other territories ruled or administered by the United Kingdom. It originated with the overseas colonies and trading posts established by England in the late 16th and early 17th centuries. At its height, it was the...

's military policy during the First World War

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

. The body met through 1917 and 1918 and consisted of Lloyd George, Prime Minister of Canada

Prime Minister of Canada

The Prime Minister of Canada is the primary minister of the Crown, chairman of the Cabinet, and thus head of government for Canada, charged with advising the Canadian monarch or viceroy on the exercise of the executive powers vested in them by the constitution...

 Sir Robert Borden

Robert Borden

Sir Robert Laird Borden, PC, GCMG, KC was a Canadian lawyer and politician. He served as the eighth Prime Minister of Canada from October 10, 1911 to July 10, 1920, and was the third Nova Scotian to hold this office...

, Prime Minister Louis Botha

Louis Botha

Louis Botha was an Afrikaner and first Prime Minister of the Union of South Africa—the forerunner of the modern South African state...

 and Jan Smuts

Jan Smuts

Jan Christiaan Smuts, OM, CH, ED, KC, FRS, PC was a prominent South African and British Commonwealth statesman, military leader and philosopher. In addition to holding various cabinet posts, he served as Prime Minister of the Union of South Africa from 1919 until 1924 and from 1939 until 1948...

 of South Africa

South Africa

The Republic of South Africa is a country in southern Africa. Located at the southern tip of Africa, it is divided into nine provinces, with of coastline on the Atlantic and Indian oceans...

, Prime Minister Billy Hughes

Billy Hughes

William Morris "Billy" Hughes, CH, KC, MHR , Australian politician, was the seventh Prime Minister of Australia from 1915 to 1923....

 of Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

, Prime Minister William Massey

William Massey

William Ferguson Massey, often known as Bill Massey or "Farmer Bill" served as the 19th Prime Minister of New Zealand from 1912 to 1925, and was the founder of the Reform Party. He is widely considered to have been one of the more skilled politicians of his time, and was known for the particular...

 of New Zealand

New Zealand

New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...

, the Secretary of State for India

Secretary of State for India

The Secretary of State for India, or India Secretary, was the British Cabinet minister responsible for the government of India and the political head of the India Office...

, Sir James Meston

James Meston, 1st Baron Meston

James Scorgie Meston, 1st Baron Meston KCSI, VD , was a prominent British civil servant, financial expert and businessman. He served as Lieutenant-Governor of the United Provinces of Agra and Oudh from 1912 to 1918....

  and other senior ministers from Britain and the dominion

Dominion

A dominion, often Dominion, refers to one of a group of autonomous polities that were nominally under British sovereignty, constituting the British Empire and British Commonwealth, beginning in the latter part of the 19th century. They have included Canada, Australia, New Zealand, Newfoundland,...

s.

In 1917 the Imperial War Conference passed a resolution regarding a future special Imperial Conference to readjust the relations of the component parts of the Empire. That readjustment should be based upon the full recognition of the dominions as autonomous nations of an Imperial Commonwealth, with an "adequate voice" in foreign policy.

Winston Churchill

Winston Churchill

Sir Winston Leonard Spencer-Churchill, was a predominantly Conservative British politician and statesman known for his leadership of the United Kingdom during the Second World War. He is widely regarded as one of the greatest wartime leaders of the century and served as Prime Minister twice...

 revived the Imperial War Cabinet during the Second World War at the insistence of Australian Prime Minister

Prime Minister of Australia

The Prime Minister of the Commonwealth of Australia is the highest minister of the Crown, leader of the Cabinet and Head of Her Majesty's Australian Government, holding office on commission from the Governor-General of Australia. The office of Prime Minister is, in practice, the most powerful...

 John Curtin

John Curtin

John Joseph Curtin , Australian politician, served as the 14th Prime Minister of Australia. Labor under Curtin formed a minority government in 1941 after the crossbench consisting of two independent MPs crossed the floor in the House of Representatives, bringing down the Coalition minority...

. Canadian Prime Minister William Lyon Mackenzie King

William Lyon Mackenzie King

William Lyon Mackenzie King, PC, OM, CMG was the dominant Canadian political leader from the 1920s through the 1940s. He served as the tenth Prime Minister of Canada from December 29, 1921 to June 28, 1926; from September 25, 1926 to August 7, 1930; and from October 23, 1935 to November 15, 1948...

declined to join the body and as Churchill was already unenthusiastic about sharing power with the dominions, the Imperial War Cabinet's role in the Second World War was greatly diminished in comparison to the previous war.