Blindgänger

Blindgänger is a German term for an unexploded ordnance (UXO) — a bomb, shell, mine or other explosive device that did not detonate when originally deployed and remains hazardous. The term is most commonly associated with World War II‑era ordnance discovered in Germany and other parts of Europe during construction or archaeology, but it can apply to any unexploded weapon from earlier conflicts.

From blind (unable to detonate) + gänger (goer/thing that travels or goes), the word historically describes munitions that appear harmless but conceal a lethal charge. In everyday use, Blindgänger refers to explosive devices that have not functioned as intended and still require careful handling.

UXO poses risks due to residual explosive energy, unstable fuzes, corrosion, and internal fragmentation. Even decades after a conflict, a device can detonate if moved or struck. Therefore, found items must not be touched, moved, or probed. People should evacuate the area, secure the perimeter, and contact local authorities or a specialized explosive ordnance disposal service.

Handling typically involves professionals assessing the device, determining whether it can be rendered safe on site or must be transported to a safe location for controlled detonation. In Germany, this work is carried out by state Kampfmittelbeseitigungsdienste or equivalent units, with procedures prioritizing public safety and minimal disruption.

In contemporary German usage, Blindgänger remains a military and civil defense term, though it can also be used metaphorically to describe failed plans or projects.