Forty-one countries have issued an international call for other states to provide at least 24 hours’ notice before launching ballistic missiles or spacecraft. Published on August 13, 2026, the joint appeal seeks to prevent misunderstandings, heightened tensions and unintended conflict caused by surprise launches. Participants include the United States, Japan, South Korea, Ukraine, the United Kingdom and countries across Europe and the Asia-Pacific region.

The countries said adequate information should be provided before launches of intercontinental ballistic missiles, submarine-launched ballistic missiles and spacecraft. They said notices should include the launch time and location, missile type and possible trajectory. Without advance warning, a long-range missile launch could be mistaken for an actual attack, creating risks of military responses, regional tension and wider conflict.

Concerns have recently increased over several missile launches in the Pacific region. North Korea’s continuing ballistic missile tests have made the regional security situation more sensitive, according to the report. The joint statement said a 24-hour notice would allow affected countries to assess potential risks and take necessary measures, reducing the likelihood of miscalculation or an incorrect response. It also noted questions over effectiveness if all major missile powers do not participate.