King-Byng Affair. July July 1 The Kuomintang begins the Northern Expedition, a military unification campaign in northern China. The Mammoth Cave National Park in Kentucky is authorized by the United States Congress. July 3 – A Caudron C.61 aircraft, operated by Compagnie Internationale de Navigation Aérienne, crashes in Czechoslovakia. July 9 – In Portugal, General Óscar Carmona takes power in a military coup. July 10 – A bolt of lightning strikes Picatinny Arsenal in New Jersey; the resulting fire causes several million pounds of explosives to blow up in the next 2–3 days. July 15 – Bombay Electric Supply and Transport Company in India introduces motor buses. July 26 – The United States National Bar Association is incorporated. August August 1 – In Mexico, the entry into force of anticlerical measures stipulated in the Constitution of 1917 causes the Cristero War. August 2 – The short-lived Western Australian Secession League is founded. August 5 – In New York, the Warner Brothers' Vitaphone system is seen by audiences for the first time, in the movie Don Juan, starring John Barrymore. August 6 – Gertrude Ederle becomes the first woman to swim the English Channel, from France to England. August 18 – In the United States, a weather map is televised for the first time, sent from NAA Arlington to the Weather Bureau office in Washington, D.C. August 22 – In Greece, Georgios Kondylis ousts Theodoros Pangalos. August 25 – Pavlos Kountouriotis announces that dictatorship has ended in Greece, and he is now the president. September September 1 – Lebanon under the French Mandate gets its first constitution, thereby becoming a republic, with Charles Debbas as its president. September 8 – The German Weimar Republic joins the League of Nations. September 11 – In Rome, Italy, Gino Lucetti throws a bomb at Benito Mussolini's car, but Mussolini is unhurt. September 14 – The Locarno Treaties of 1925 are ratified in Geneva, and come into effect. September 18 – Great Miami Hurricane: A strong hurricane devastates Miami, leaving over 100 dead and causing several hundred million dollars in damage (equal to nearly $100 billion in the modern day). September 19 – Giuseppe Meazza (San Siro) Stadium, well known among sports venues in Italy, officially opens in Milan. September 20 – The North Side Gang attempts to assassinate Al Capone, at the apex of his power at this time, spraying his headquarters in Cicero,