Signed by 26 nations on 1 January 1942, this declaration formalized the Allied coalition in World War II and laid the groundwork for the United Nations.
Key Facts
- Initial signatories
- 26 nations signed on 1–2 January 1942
- Total signatories
- 47 national governments by 1945
- Big Four signers
- United States, United Kingdom, Soviet Union, China
- Conference venue
- Arcadia Conference, Washington D.C.
- UN Charter signed
- 26 June 1945 by 50 countries
By the Numbers
Location
Cause → Event → Consequence
Following the United States' entry into World War II after the attack on Pearl Harbor, Allied leaders gathered at the Arcadia Conference in Washington D.C. in late 1941 and early 1942 to coordinate a unified military and political response against the Axis powers, recognizing the need for a formal statement of shared purpose.
On 1 January 1942, the Allied Big Four—the United States, the United Kingdom, the Soviet Union, and China—signed the Declaration by United Nations at the Arcadia Conference. The following day, representatives of 22 additional nations added their signatures, bringing the initial total to 26. By 1945, 47 governments had signed the document.
The Declaration formalized the Allied coalition and committed signatory nations to mutual cooperation against the Axis powers. It also provided the conceptual and organizational foundation for the United Nations, which was formally established when 50 countries signed the UN Charter on 26 June 1945, creating a lasting postwar international institution.
Political Outcome
Formalized the Allied coalition in World War II and established the basis for the postwar United Nations organization.
Allied nations operating without a unified formal framework at the start of US involvement in World War II
26 (later 47) nations formally allied under a shared declaration, leading to creation of the United Nations in 1945