1777 marked the beginning of a very long departure from Salzburg life. Mozart became deeply dissatisfied with his hometown and again requested leave. He became so irritated by yet another offer for leave that he dismissed both Mozart and Leopold, while Mozart agreed to leave in a pointedly laconic manner anyway. As a result, a carriage was hired and he set off — without his father but this time with his mother — on 23 September and left first for Munich and then for Augsburg.
Hans's great-great-grandson, David Jacob Eisenhower (1863–1942), was Eisenhower's father and was a college-educated engineer, despite his own father Jacob's urging to stay on the family farm. Eisenhower's mother, Ida Elizabeth (Stover) Eisenhower, born in Virginia, of predominantly German Protestant ancestry, moved to Kansas from Virginia. She married David on September 23, 1885, in Lecompton, Kansas, on the campus of their alma mater, Lane University. Dwight David Eisenhower's lineage also included English ancestors (on both sides) and Scottish ancestors (through his maternal line).
To increase pressure on China by blocking supply routes, and to better position Japanese forces in the event of a war with the Western powers, Japan invaded and occupied northern Indochina. Afterwards, the United States embargoed iron, steel and mechanical parts against Japan.
On 23 September 1945, with the knowledge of the British commander in Saigon, French forces overthrew the local DRV (the Democratic Republic of Vietnam) government, and declared French authority restored in Cochinchina.
In mid-September, the Republican ticket faced a major crisis. The media reported that Nixon had a political fund, maintained by his backers, which reimbursed him for political expenses. Such a fund was not illegal but it exposed Nixon to allegations of possible conflict of interest. With pressure building for Eisenhower to demand Nixon's resignation from the ticket the senator went on television to deliver an address to the nation on September 23, 1952. The address, later termed the Checkers speech, was heard by about 60 million Americans—including the largest television audience up to that point. Nixon emotionally defended himself, stating that the fund was not secret, nor had donors received special favors. He painted himself as a man of modest means (his wife had no mink coat; instead she wore a "respectable Republican cloth coat") and a patriot. The speech would be remembered for the gift which Nixon had received, but which he would not give back: "a little cocker spaniel dog … sent all the way from Texas. And our little girl—Tricia, the 6-year-old—named it Checkers." The speech prompted a huge public outpouring of support for Nixon.
The Pact of Madrid, signed on September 23, 1953, by Francoist Spain and the United States, was a significant effort to break the international isolation of Spain after World War II, together with the Concordat of 1953. This development came at a time when other victorious Allies of World War II and much of the rest of the world remained hostile (for the 1946 United Nations condemnation of the Francoist regime, see "Spanish Question") to a fascist regime sympathetic to the cause of the former Axis powers and established with Nazi assistance. This accord took the form of three separate executive agreements that pledged the United States to furnish economic and military aid to Spain. The United States, in turn, was to be permitted to construct and to utilize air and naval bases on Spanish territory (Naval Station Rota, Morón Air Base, Torrejón Air Base, and Zaragoza Air Base).
Though the Iraqi air invasion surprised the Iranians, the Iranian air force retaliated the day after with a large-scale attack against Iraqi air bases and infrastructure in Operation Kaman 99. Groups of F-4 Phantom and F-5 Tiger fighter jets attacked targets throughout Iraq, such as oil facilities, dams, petrochemical plants, and oil refineries, and included Mosul Airbase, Baghdad, and the Kirkuk oil refinery.
On 23 September 1998, acting under Chapter VII of the United Nations Charter, the UN Security Council adopted Resolution 1199. This expressed 'grave concern' at reports reaching the Secretary General that over 230,000 people had been displaced from their homes by 'the excessive and indiscriminate use of force by Serbian security forces and the Yugoslav Army', demanding that all parties in Kosovo and the Federal Republic of Yugoslavia cease hostilities and maintain a ceasefire.
By 2008, both Nokia and BlackBerry announced touch-based smartphones to rival the iPhone 3G, and Android's focus eventually switched to just touchscreens. The first commercially available smartphone running Android was the HTC Dream, also known as T-Mobile G1, announced on September 23, 2008.