Eugène Ricklin Bloody Sunday is a name given to political clashes that occurred in Colmar, Alsace, France on August 22, 1926.
The theme of the meeting was to denounce measures by the French state against the signatories of the Alsatian autonomist Heimatbund manifesto.
[1][2] However, a large group of French nationalists had assembled at the meeting point of the rally.
As Dr. Eugène Ricklin, a clerical autonomist and one of the main speakers of the event, and Joseph Rossé, reached the Colmar train station, they were attacked by the French nationalists.
[1][2][3] The Bloody Sunday rally was significant in breaking up the taboo of cooperation between communists and Catholic autonomists.