Historedia
Episode 1 of 2

Prussian Invasion of Holstein

When
9 June 1866
Where
Holstein
Part of
Outbreak of the Austro-Prussian War

Prussia invaded Holstein on 9 June 1866, declaring the Gastein Convention nullified after Austrian diplomatic moves.

Prussia declared the Gastein Convention nullified and invaded Holstein on 9 June 1866. This action followed Austrian decisions to bring the Schleswig-Holstein dispute before the German Diet and convene the Diet of Holstein, escalating tensions.

Sources

  1. Austro-Prussian War Wikipedia, revision of 2026-09-30

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.