Second Quebec Conference

{{Short description|1944 wartime meeting of the UK and US governments in Canada}}

{{One source |date=September 2024}}

{{Use American English |date=September 2024}}

{{Use mdy dates |date=September 2024}}

{{Infobox summit meeting

| name = Second Quebec Conference

| other_titles = Octagon

| image = Prime Minister's Reception at the Chateau Frontenac during the Octagon Conference.jpg

| alt =

| caption = The Prime Minister's Reception hosted at the Château Frontenac

| country = {{flag|Canada|1921}}

| date = September 12–16, 1944

| motto =

| venues =

| cities = Quebec City, Québec

| participants = {{Flag|United Kingdom}}
{{Flag|United States|1912}}

| chairperson =

| follows =

| precedes =

| website =

| keypoints =

}}

image:Eleanor Roosevelt, Princess Alice, and Mrs. Winston Churchill at Quebec, Canada for conference - NARA - 196993.jpg, Princess Alice, and Clementine Churchill during the conference.]]

The Second Quebec Conference (codenamed "OCTAGON") was a high-level military conference held during World War II by the British and American governments. The conference was held in Quebec City, September 12 – September 16, 1944, and was the second conference to be held in Quebec, after "QUADRANT" in August 1943. The chief representatives were Winston Churchill, Franklin D. Roosevelt and the Combined Chiefs of Staff. Canada's Prime Minister William Lyon Mackenzie King was the host but did not attend the key meetings.

Agreements were reached on the following topics: Allied occupation zones in defeated Germany, the Morgenthau Plan to demilitarize Germany, continued U.S. Lend-Lease aid to Britain, and the role of the Royal Navy in the war against Japan. Based on the Hyde Park Aide-Mémoire, they made plans to drop the atomic bomb on Japan.