Thursday, August 19, 1943. The United States and the UK promise not to nuke each other.

The Quebec Agreement, concerning nuclear weapons, was agreed upon between the US and the UK.

August 19, 1943

The Citadel, Quebec.

Articles of Agreement Governing Collaboration Between The Authorities of the U.S.A. and the U.K. in the Matter of Tube Alloys

Whereas it is vital to our common safety in the present War to bring the Tube Alloys project to fruition at the earliest moments; and 

Whereas this maybe more speedily achieved if all available British and American brains and resources are pooled; and 

Whereas owing to war conditions it would be an improvident use of war resources to duplicate plants on a large scale on both sides of the Atlantic and therefore a far greater expense has fallen upon the United States;

It is agreed between us

First, that we will never use this agency against each other.

Secondly, that we will not use it against third parties without each other's consent.

Thirdly, that we will not either of us communicate any information about Tube Alloys to third parties except by mutual consent.

Fourthly, that in view of the heavy burden of production falling upon the United States as the result of a wise division of war effort, the British Government recognize that any post-war advantages of an industrial or commercial character shall be dealt with as between the United States and Great Britain on terms to be specified by the President of the United States to the Prime Minister of Great Britain. The Prime Minister expressly disclaims any interest in these industrial and commercial aspects beyond what may be considered by the President of the United States to be fair and just and in harmony with the economic welfare of the world.

And Fifthly, that the following arrangements shall be made to ensure full and effective collaboration between the two countries in bringing the project to fruition:

(a) There shall be set up in Washington a Combined Policy Committee composed of:

The Secretary of War. (United States)

Dr. Vannevar Bush.  (United States)

Dr. James B. Conant.  (United States)

Field-Marshal Sir John Dill, G.C.B., C.M.G., D.S.O.  (United Kingdom)

Colonel the Right Hon. J. J. Llewellin, C.B.E., M.C., M.P.  (United Kingdom)

The Honourable C. D. Howe.  (Canada)

The functions of this Committee, subject to the control of the respective Governments, will be:

(1) To agree from time to time upon the programme of work to be carried out in the two countries.

(2) To keep all sections of the project under constant review.

(3) To allocate materials, apparatus and plant, in limited supply, in accordance with the requirements of the programme agreed by the Committee.

(4) To settle any questions which may arise on the interpretation or application of this Agreement.

(b) There shall be complete interchange of information and ideas on all sections of the project between members of the Policy Committee and their immediate technical advisers.

(c) In the field of scientific research and development there shall be full and effective interchange of information and ideas between those in the two countries engaged in the same sections of the field.

(d) In the field of design, construction and operation of large-scale plants, interchange of information and ideas shall be regulated by such ad hoc arrangements as may, in each section of the field, appear to be necessary or desirable if the project is to be brought to fruition at the earliest moment. Such ad hoc arrangements shall be subject to the approval of the Policy Committee.

Aug. 19th 1943

Approved

Franklin D. Roosevelt

Winston S. Churchill

Tube alloys were atomic weapons.

The Italians began to negotiate with the Allies in Lisbon, bargaining for a surrender.

The Australian Army prevailed in a three-month series of actions on New Guinea known as the e Battle of Bobdubi

The U.S. Office of War Information released the film "Black Marketing".