August 13th, 7 a.m.
After a whole night of global panic, the situation had finally stabilized completely.
The domestic front consistently claimed the cause was a "navigation error" that led to the accidental airspace intrusion, and expressed regret and apology to the three affected countries.
Other parties had nervously hovered over the nuclear button while investigating and were on tenterhooks for hours, until they confirmed it was a one-time accident with no intention of war and jointly issued the "August 12 Emergency Incident Investigation Report and Anti-Nuclear War Declaration." The United Nations passed it almost without discussion, within ten minutes after its release, with a unanimous vote in favor from all representatives.