 Complete the following phrase:  After the Brest-Litovsk Treaty, the Left Socialist-Revolutionaries had abandoned the coalition and increasingly viewed the Bolsheviks as traitors to the revolution. In July 1918, the Left Socialist-Revolutionary Yakov Blumkin assassinated the German ambassador to Russia, Wilhelm von Mirbach, hoping that the ensuing diplomatic incident would lead to a relaunched revolutionary war against Germany. The Left Socialist-Revolutionaries then 