Gerboise blanche
1960 CE.
Shown on the map at 26.166°, -0.102°.
Gerboise Blanche (or Opération Gerboise Blanche) was the codename of the second French nuclear test. It was conducted by the Nuclear Experiments Operational Group (GOEN), a unit of the Joint Special Weapons Command on 1 April 1960, at the Saharan Military Experiments Centre near Reggane, French Algeria in the Sahara desert region of Tanezrouft, during the Algerian War.
Text from the Wikipedia article Gerboise Blanche, licensed CC BY-SA 4.0.