And it is not the only case. The French people went to war in 1914 "la fleur au fusil"[0]. Jean Jaurès is assassinated for his pacifism and (his assassin would be found not guilty - despite being totally guilty - in 1919).

[0]: a more nuanced take that is illuminating can be read here: https://www.france24.com/fr/20140730-grande-guerre-poilus-vr...