It was part of the wider Freikorps movement, volunteer fighters who harshly suppressed socialists, anarchists and communists.
In the wake of the First World War, the new Weimar Republic saw a massive increase in revolutionary activity, culminating in the German Revolution of 1918–19.
After a month, following the suppression of the Spartacist uprising, Gustav Noske authorized a military intervention against Bremen's revolutionaries.
Caspari, a veteran of the Boxer Rebellion and the First World War, had previously been expelled from the Bremen workers' and soldiers' council after communist pressure.
In the ensuing combat, twenty-four Freikorps fighters and twenty-eight armed workers were killed, in addition to twenty-nine civilian casualties (eighteen men, five women, and six children).