The Caliphate of Neukölln was a short-lived Islamic government, which claimed the title of caliphate, in Berlin during the German Collapse.
It is notorious for being a front for the Abou-Chaker-Clan, using Islam exclusively to gain support for their regime only established to fill a perceived power-vacuum with a cartel-state.
The proto-state arose of Islamist protests, and later rebellions, in the newly established Neukölln Commune. Viewing the protesters as easily influenced, and the commune as extremely weak, the Abou-Chaker-Clan seized power within the movement and started a full-on rebellion against the commune government, this rebellion lasted only one month however as it was crushed by the commune government.