The 2020 Review Conference of the Treaty on the Non-Proliferation of Nuclear Weapons was postponed due to the COVID-19 pandemic. Originally scheduled to take place in New York, the conference was rescheduled to ensure the safety of participants and to allow for meaningful discussions on the treaty's future.

The 2015 Review Conference of the Treaty on the Non-Proliferation of Nuclear Weapons ended without reaching a consensus on a final document. Key issues included disagreements over the establishment of a Middle East zone free of nuclear weapons, highlighting ongoing challenges in the treaty's implementation.

The 2010 Review Conference of the Treaty on the Non-Proliferation of Nuclear Weapons concluded with a consensus on a final document. This document included a 64-point action plan addressing nuclear disarmament, non-proliferation, and the peaceful use of nuclear energy, marking a significant achievement for the treaty.

The 2005 Review Conference of the Treaty on the Non-Proliferation of Nuclear Weapons ended without a consensus on a final document. The conference highlighted divisions among member states on issues such as disarmament and non-proliferation, reflecting the challenges in achieving global nuclear disarmament.

The 2000 Review Conference of the Treaty on the Non-Proliferation of Nuclear Weapons concluded with the adoption of a final document that included 13 practical steps for systematic and progressive efforts to implement Article VI of the treaty, which calls for nuclear disarmament.

In 1995, the Treaty on the Non-Proliferation of Nuclear Weapons was extended indefinitely. This decision was made during the Review and Extension Conference held in New York, reflecting the international community's commitment to the treaty's goals of preventing nuclear proliferation and promoting disarmament.

The first Review Conference of the Treaty on the Non-Proliferation of Nuclear Weapons was held in Geneva. This conference was designed to assess the implementation of the treaty and to address any issues that had arisen since its entry into force. It set a precedent for future review conferences.

The Treaty on the Non-Proliferation of Nuclear Weapons officially entered into force on March 5, 1970. This marked the beginning of a new era in nuclear disarmament and non-proliferation, as the treaty established a framework for preventing the spread of nuclear weapons and promoting disarmament.

The Treaty on the Non-Proliferation of Nuclear Weapons (NPT) was opened for signature on July 1, 1968, in Washington, London, and Moscow. It was signed by 62 countries, marking a significant step in international efforts to prevent the spread of nuclear weapons and promote peaceful uses of nuclear energy.

The first draft of what would become the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) was submitted to the Eighteen Nation Committee on Disarmament in Geneva. This draft laid the groundwork for negotiations among nuclear and non-nuclear states to prevent the spread of nuclear weapons.