August 22 is the worst day of the war for France as 27,000 troops die. August 23: Japan declares war on Germany. August 26-30: Battle of Tannenberg. German General Paul von Hindenburg halts Russian breakthrough in Prussia.
August 22 is the worst day of the war for France as 27,000 troops die. August 23: Japan declares war on Germany. August 26-30: Battle of Tannenberg. German General Paul von Hindenburg halts Russian breakthrough in Prussia.