Switzerland and weapons of mass destruction
| Swiss Confederation | |
|---|---|
| Nuclear program start date | 1945 (ended in 1988) |
| First nuclear weapon test | None |
| First thermonuclear weapon test | None |
| Last nuclear test | None |
| Largest yield test | None |
| Total tests | None |
| Peak stockpile | None |
| Current stockpile | None |
| Current strategic arsenal | None |
| Cumulative strategic arsenal in megatonnage | None |
| Maximum missile range | None |
| NPT party | Yes |
Switzerland made detailed plans to acquire and test nuclear weapons during the Cold War. Less than two weeks after the nuclear bombings of Hiroshima and Nagasaki, the Swiss government started studying the possibility of building nuclear weapons, and continued its military nuclear program for 43 years until 1988. It has since signed and ratified the Treaty on the Non-Proliferation of Nuclear Weapons. Switzerland never possessed biological weapons, but did have a program to develop and test chemical weapons.