The Cristero War began in villages across Mexico in the Los Altos region of the state of Jalisco. The uprising began in protest against anti-clerical laws in Mexico and the rebels called themselves "Cristeros" as fighters for so named because they fought for Christ.
British concessions in China, located at Hankou (Hankow) and Jiujiang (Kiukiang) were invaded by crowds of protesters against British imperialism. A British soldier fired into the crowd at Hankou, killing one protestor and wounding dozens of others. Within days, Britain relinquished control of both concessions to the Chinese government, but soon sent troops to protect its concession at Shanghai.
Boris Rtcheouloff filed a patent application for "Means of recording and reproudcing pictures, images and the like", the first means for magnetic recording of a television signal onto a moving strip. British patent no. 288,680 was granted in 1928, but the forerunner of videotape was never manufactured.
Robert G. Elliott, the state electrician for several states, carried out six executions in the electric chair in the same day. In the morning, he put to death Edward Hinlein, John Devereaux and John McGlaughlin in Boston for the 1925 murder of a night watchman. Elliott then caught a train to New York, had dinner, took his family to the movies, and then went up to Sing Sing, where he carried out the capital punishment for Charles Goldson, Edgar Humes and George Williams for the 1926 murder of another watchman.
Philo T. Farnsworth, a 20 year old American inventor, filed his first of many patent applications, for a method of electronically scanning images and transmitting them as a television signal. U.S. Patent No. 1,773,980 was granted on August 26, 1930.
Laurier Palace Theatre fire: Seventy-eight children were killed in a panic that followed the outbreak of a fire at the Laurier Palace cinema in Montreal. Shortly after the 2:00 matinee began, flames were spotted. On three of the theatre's four fire exits, the evacuation was orderly, but on the stairway at the east side of the building, children were trampled five steps away from the door. The dead ranged in age from 4 to 16. Only one of the victims was older than 18.
For the first time in the 368-year history of the Index Librorum Prohibitorum, the Roman Catholic Church's list of prohibited books, a newspaper was banned by papal decree. The French royalist daily Action Française was banned by Pope Pius XI for articles "written against the Holy See and the supreme pontiff himself".
In a special message to Congress, President Coolidge said that the 15 American warships and 5,000 members of the Navy and the Marines would be dispatched toward Nicaragua and Mexico to protect American interests. On the same day, the U.S. Department of the Navy announced that 800 U.S. Marines would be sent to China to for the same purpose, to be transported from Guam by the cruiser USS Huron.
With four days left in her term, Texas Governor Miriam A. Ferguson (known popularly as "Ma Ferguson") halted further grants of clemency to Texas convicts. The lame duck governor had pardoned or commuted the sentences of a record 3,595 persons convicted of crimes, including 1,350 full pardons.
Scopes Trial: In a split decision, the Tennessee Supreme Court upheld the constitutionlity of Section 49-1922 of the Tennessee Code, which prohibited the teaching of evolution. The Court set aside the order for the fine levied against teacher John T. Scopes. Chief Justice Grafton Green said, "All of us agree that nothing is to be gained by prolonging the life of this bizarre case." 
Engineering: Dumbarton Bridge linking the (then) town of Newark to the city of Menlo Park, CA becomes the first auto bridge over San Francisco Bay. 
George Young, a 17 year old from Toronto, became the first person to swim the 22 miles between Catalina Island, California, and the mainland. At noon the previous day, 102 competitors dived into the waters for the prize offered by William Wrigley, Jr. Young was the only person to finish the task, arriving at the Point Vincente Lighthouse at 3:47 a.m.
Movie comedian Charlie Chaplin was ordered to pay $4,000 a month alimony to his wife, Lita Grey Chaplin, by a Los Angeles court. The same day, the Internal Revenue Service filed a lien against Chaplin for seven years of back taxes and penalties, totalling $1,073,721.47 between 1918 and 1924.
American ratification of the 1923 Treaty of Lausanne, and the establishment of diplomatic relations with Turkey, failed to get approval in the U.S. Senate. Though favored by a 50–34 margin, a two-thirds majority was needed.
The first legislative session held in The Council House of India (now the Parliament House) was opened with a meeting of the Central Legislative Assembly. The House, a circular building covering nearly six acres, is now part of the Parliament Assembly where the Lok Sabha and the Rajya Sabha convene.
Frank L. Smith, recently selected to serve as a United States Senator from Illinois, was not allowed to take the oath of office. The U.S. Senate voted 48–33 against seating him pending further investigation of the financing of his 1926 primary election campaign.
The first sports broadcast in the United Kingdom was made by BBC Radio, with Teddy Wakelam providing the play-by-play of a soccer football game between Arsenal and Sheffield United. Subscribers to Radio Times could follow the game with a diagram, designed by producer Lance Sieveking, that divided the field into eight squares. The game ended in a 1–1 draw.
The Tamanweis, a war ceremonial for the Swinomish American Indian tribe, was performed for the first time since it had been outlawed by federal law. The occasion, a celebration at La Conner, Washington, of the 1855 Mukiliteo peace treaty, also saw a traditional feast and the playing of the game "Fla-Hal" 
Ban Johnson, who had been President of baseball's American League since its founding in 1900, was fired by vote of the league's eight teams. Johnson had publicly criticized the ruling, by baseball commissioner Landis, on the Black Sox Scandal. Eight years remained on his contract, so he retained his title, but his duties were assumed by Frank J. Navin of the Detroit Tigers.
The United Kingdom dispatched 16,000 servicemen to defend the British concession in Shanghai. Commanded by Major General John Duncan, the Shanghai Defense Force consisted of 12,000 men from the 13th and 14th British infantry brigades, and the 20th Indian Infantry, to join 3,000 naval ratings and 1,000 marines.
Amid fears that the Coolidge Administration would lead the United States into war with Mexico, the U.S. Senate voted 79–0 to ask President Coolidge to seek arbitration of disputes over oil rights.
The merger of the Remington Typewriter Company and Rand-Kardex Bureau, Inc. (created from the merger of two business recordkeeping systesm) formed Remington Rand, which would make the UNIVAC, the world's first business computer. Through further mergers, the company became Sperry Rand (1955), and Unisys (1986).
J. Frank Norris, popular Southern Baptist leader, was acquitted of murder charges arising from the July 17, 1926, death of wholesale lumberman Dexter B. Chipps
At Oslo, the Storthing voted 112-33 to reject a proposal for complete disarmament of Norway. A bill to reorganize the army and navy was approved as an alternative.
In Bannock County, Idaho a basketball game at the town of Turner, ended in tragedy when an explosion toppled the walls at the recreation hall of the Mormon chapel. Seven people were killed and 20 others seriously injured. The lights had failed and a person lit a match, triggering a gas explosion.
United Independent Broadcasters, Inc., was incorporated as a network of 16 radio stations. On September 18, 1927, United would be acquired by William S. Paley and renamed the Columbia Broadcasting System, providing CBS Radio, and later the CBS Television Network.
A year after proclaiming himself King of the Hejaz, Arabian sultan Ibn Saud proclaimed himself as King of Najd as well. The independence of the Kingdom of Hejaz and Nejd was recognized on May 20, 1927, and renamed as the Kingdom of Saudi Arabia in 1932.
Ty Cobb and Tris Speaker, two of the greatest outfielders in American baseball history, were both exonerated of charges of wrongdoing by Commissioner Landis. Both had been accused, by Dutch Leonard, of conspiracy to throw a game in 1919. Cobb was elected to baseball's Hall of Fame in its first year (1936), and Speaker in its second.
A hurricane swept across the British Isles, killing twenty people and injuring hundreds. Nineteen of the dead were in Scotland, including eight in Glasgow, and another person was killed in Ireland. The storm moved on a line from Land's End in England, to John O'Groats in Scotland.
In Schenectady, New York, the General Electric Company demonstrated its own sound-on-film process, the first to synchronize recorded sights and sounds on a single strip of film. The product of six years research opened a new era in movies, taking the world from silent films to the "talkies".
July Revolt of 1927: At the Austrian village of Schattendorf, members of the right-wing veterans' organization "Frontkampfer Vereinigung" fired on members of the leftist organization Schutzbund, killing one of them and seriously wounding five others. An 8-year old bystander was killed by the gunfire. When a jury acquitted the three Frontkampfer three months later, 84 protestors were killed by the Austrian police.
After seven years, the Inter-Allied Military Commission, which had overseen the occupation of Germany since the end of World War I, closed its headquarters in Berlin after France's Marshal Ferdinand Foch declared that Germany's obligations under the Treaty of Versailles had been completed.;
Mae West's play The Drag, the first theatrical production to address homosexuality, had its world premiere in Bridgeport, Connecticut. West hired 40 gay men to the cast. Although profitable, the play was banned by police in Bayonne, New Jersey, and was unable to find a theatre in New York City.
Died:Sybil Bauer, 23, American swimmer who broke 23 women's world records, and (in 1922), the men's world record for the 440 backstroke. Bauer, who didn't learn to swim until she was 15, had been engaged to marry Ed Sullivan but died of cancer.