At 8 o'clock in the morning a dense throng of workers - almost 10,000 - assembled in the square, which the police had already occupied well ahead of time. Karl Liebknecht's voice then rang out: 'Down with the War! Down with the Government!' The police immediately rushed at him. For the first time since the beginning of the war open resistance to it had appeared on the streets of the capital. The ice was broken.
— Paul Frolich