Argentina holds its general elections, with Marcelo T. de Alvear winning the presidency (under his term, Argentina will see tremendous economic growth, with GDP per capita matching Western Europe):
500,000 members of the United Mine Workers of America start a coal strike across the United States. Workers at Scranton, Pennsylvania walking out of their jobs:
Members of the Ulster Special Constabulary/Royal Irish Constabulary murder six Catholic civilians, including a child, in Belfast, supposedly in retaliation for the killing of an RIC officer by the IRA. Funeral procession for the victims:
6 members of a small farmstead in Bavaria, Germany are all brutally murdered by an unknown assailant. Known as the Hinterkaifeck murders, the case remains unsolved. The site of the murders:
The Irish Free State Act is passed by the British Parliament and given Royal Assent, which brings force of law to the Anglo-Irish Treaty, which was signed December of last year:
U.S. Senate votes to ratify the Washington Naval Treaty, which limits the size of the navies of the Great Powers, as well as a treaty limiting the use of submarines and poison gas in warfare:
Two Russian ultranationalists attempt to assassinate former Russian Foreign Minister Pavel Milyukov (left) in Berlin. His friend Vladimir Dmitrievich Nabokov (right, father of author Vladimir Nabokov) is killed attempting to stop the assassins.
Two Koreans attempt to assassinate former Japanese Minister of War Tanaka Giichi (pictured) in Shanghai, but he escapes unharmed. In the crossfire, an American woman is killed and four others are wounded: