In April 1903, Athletic Club Sucursal de Madrid was founded as a branch of Athletic Bilbao by Basque students living in Madrid.
In 1904, dissident members of Real Madrid joined Athletic Club Sucursal de Madrid.
In late 1909, Juan Elorduy traveled to England to buy kits for Athletic Bilbao and Athletic Madrid, but instead purchased red and white shirts from Southampton FC due to a shortage of Blackburn Rovers kits.
By 1910, both Athletic Bilbao and Athletic Club Sucursal de Madrid adopted their current colors of red and white stripes, possibly due to the cost-effectiveness of using mattress ticking material for shirts. This contributed to the club's nickname, Los Colchoneros.
Athletic Bilbao won the 1911 Copa del Rey Final using several 'borrowed' players from Athletic Madrid, including Manolón who scored one of their goals.
In 1919, the Compañía Urbanizadora Metropolitana acquired land near the Ciudad Universitaria.
In 1921, Athletic Club Sucursal de Madrid were Copa del Rey runners-up, facing Athletic Bilbao in the final.
In 1921, Athletic Madrid became independent of Athletic Bilbao and moved into the Estadio Metropolitano de Madrid, a 35,800-seater stadium.
In 1926, Athletic Club Sucursal de Madrid were Copa del Rey runners-up again, facing parent club Athletic Bilbao.
In 1928, Athletic Club Sucursal de Madrid was invited to join the Primera División of the inaugural La Liga, to be played the following year.
In 1934, Athletic Club Sucursal de Madrid briefly returned to La Liga.
In 1936, Athletic Club Sucursal de Madrid was relegated from La Liga after Josep Samitier replaced Fred Pentland as manager, but they were given a reprieve due to the Spanish Civil War affecting other teams.
In 1937, Aviación Nacional was founded by three aviation officers of the Spanish Air Force.
On 26 November 1939, Aviación Nacional won a match against Osasuna 3–1, securing a spot in the Primera División, leading to the formation of Athletic Aviación de Madrid.
In 1939, Athletic Club Sucursal de Madrid merged with Club Aviación Nacional.
In September 1940, Atlético Aviación won the first Supercopa de España after beating RCD Español with a 10–4 aggregate victory.
In 1941, under manager Ricardo Zamora, Athletic Aviación retained their La Liga title.
On 14 December 1946, the club decided to drop the military association from its name.
In 1946, following the merger with Club Aviación Nacional, the club was renamed to Atlético de Madrid.
In 1947, Atlético beat Real Madrid 5–0 at the Metropolitano, marking their biggest win over their cross-town rivals.
In 1947, the 1947–48 campaign ended Germán Gómez's eight consecutive seasons for the Rojiblancos.
In 1950, under Helenio Herrera and with the help of Larbi Benbarek, Atlético won La Liga.
In 1951, under Helenio Herrera and with the help of Larbi Benbarek, Atlético won La Liga again.
In 1953, with the departure of Helenio Herrera, Atlético began to fall behind Real Madrid and Barcelona.
In 1957, Ferdinand Daučík took charge of Atlético Madrid.
In the 1957–58 season, Atlético finished second in La Liga, qualifying for the 1958–59 European Cup because Real Madrid was the reigning champion.
In 1960, led by former Real Madrid coach José Villalonga, Atlético Madrid defeated Real Madrid in the Copa del Rey final.
Atletico's 2010 Europa League win was the first time since the 1961–62 European Cup Winners' Cup that Atlético had claimed a European title.
In 1961, led by José Villalonga, Atlético Madrid defeated Real Madrid in the Copa del Rey final for the second consecutive year.
In 1962, Atlético Madrid won the European Cup Winners' Cup, beating Fiorentina 3–0 after a replay.
In 1963, Atlético Madrid reached the European Cup Winners' Cup final but lost to Tottenham Hotspur 5–1.
In 1965, Atlético Madrid finished as La Liga runners-up after an intense battle for the title with Real Madrid.
On October 2, 1966, Atlético Madrid inaugurated the Vicente Calderón Stadium with a fixture against Valencia, moving from the Estadio Metropolitano de Madrid.
In 1969, José Eulogio Gárate won the Pichichi.
In 1970, José Eulogio Gárate won the Pichichi.
In 1971, José Eulogio Gárate won the Pichichi.
Atletico faced city rivals Real Madrid in the May 2014 Champions League final, which was their first Champions League final since 1974.
In 1974, Atlético Madrid lost the European Cup Final against Bayern Munich after a replay, despite a late goal from Aragonés.
In 1974, Atlético Madrid reached the final of the UEFA Champions League.
Shortly after the defeat in the 1974 European Cup Final, Atlético appointed their veteran player Luis Aragonés as coach.
Between 1961 and 1980, Real Madrid dominated La Liga, winning the competition 14 times. During this era, only Atlético offered Real any serious challenge.
In 1980, Luis Aragonés's first coaching spell ended.
In 1982, Luis Aragonés started his second coaching spell.
In 1985, Luis Aragonés led Atlético Madrid to a runners-up finish in La Liga and a victory in the Copa del Rey, with significant contributions from Hugo Sánchez.
In 1986, Atlético Madrid lost their third successive European final, this time in the European Cup Winners' Cup against Dynamo Kyiv.
In 1987, Jesús Gil oversaw the transformation of Atlético Madrid from a sports club to a sociedad anónima deportiva (S.A.D.).
In 1987, Luis Aragonés's second coaching spell ended.
In 1987, controversial politician and businessman Jesús Gil became the president of Atlético Madrid.
In 1991, Luis Aragonés started his third coaching spell.
In 1992, Atlético won a Copa del Rey trophy and Gil closed down Atlético's youth academy.
In 1992, Jesús Gil committed a fraud of misappropriation by seizing 95% of Atlético's shares while failing to effectively pay during the club's forced conversion from fan-owned club to Sociedad Anónima Deportiva.
In 1993, Luis Aragonés's third coaching spell ended.
In the 1994–95 league campaign, Atlético avoided relegation via a draw on the last day of the season.
According to Spanish football writer Andy West, Atlético fans came to quickly to embrace Simeone, especially in light of his role as a pivotal player in their 1995-96 league and cup double.
In the summer of 1995, Atlético made another managerial change along with a wholesale squad clearance during the summer transfer window.
During the 2007-08 season, the team finished in fourth place, qualifying for the UEFA Champions League for the first time since the 1996–97 season.
In 1996, Atlético Madrid won both the La Liga title and the Copa del Rey, achieving a domestic double.
The La Liga title win on May 17, 2014 was Atletico's first since 1996.
In the 1996–97 season, Atlético participated in the UEFA Champions League for the first time, but were eliminated by Ajax in the quarter-finals.
Before the 1997–98 season, Atlético continued heavy spending and Arrigo Sacchi was appointed manager, though he remained for less than six months.
In December 1999, Gil and his board were suspended pending an investigation into the misuse of club funds.
In early 1999, Antić returned briefly only to be replaced with Claudio Ranieri at the end of the season.
In 2000, Atlético were relegated for the second time in 66 years, despite reaching the Copa del Rey final.
In 2002, Atlético won the Segunda División championship, bringing them back to the Primera División.
In 2002, Luis Aragonés started his fourth coaching spell.
In May 2003, controversial politician and businessman Jesús Gil resigned as club president. Gil had been running the club since 1987.
In July 2003, Chelsea owner Roman Abramovich offered £28 million for Fernando Torres, which was rejected by Atlético.
In 2003, Luis Aragonés's fourth coaching spell ended.
In 2003, Prince Felipe, later King Felipe VI, became the honorary president of Atlético Madrid.
In 2006, Atlético signed Portuguese midfielders Costinha and Maniche, as well as Argentine forward Sergio Agüero.
In July 2007, Fernando Torres left Atlético for Liverpool for €38 million.
In July 2007, the Atlético board reached an agreement with the City of Madrid to sell the land where their stadium was located and move the club to the City-owned Olympic Stadium.
On 3 February 2009, Javier Aguirre was dismissed from his post as manager after a poor start to the season. Abel Resino was appointed as Atlético's new manager.
In October 2009, Quique Sánchez Flores became the new manager for Atlético Madrid.
In 2009, Koke began his Atlético Madrid career, marking the start of his journey with the club where he would play in more than 690 matches.
In May 2010, Atlético won the Europa League, beating Fulham 2–1 in the final and reached the Copa del Rey finals on 19 May 2010, where they lost 2–0 against Sevilla.
On 27 August 2010, Atlético won the UEFA Super Cup against Inter Milan 2–0.
Atlético had a comparatively disappointing 2010–11 season, finishing only seventh in the League, leading to the departure of manager Sánchez Flores.
In 2010, Atlético Madrid won the UEFA Europa League and the UEFA Super Cup.
On 23 December 2011, Atlético appointed Diego Simeone as manager, replacing Gregorio Manzano.
On 9 May 2012, Simeone led Atlético to their second Europa League win, beating Athletic Bilbao 3–0 in the final.
On 31 August 2012, Atlético won the UEFA Super Cup against Chelsea 4–1, including a hat-trick by Falcao.
In 2012, Atlético Madrid won the UEFA Europa League and the UEFA Super Cup again.
On 17 May 2013, Atlético beat Real Madrid 2–1 in the Copa del Rey final, ending a 14-year winless streak in the Madrid derby.
In 2014, Atlético Madrid reached the final of the UEFA Champions League.
In 2016, Atlético Madrid reached the final of the UEFA Champions League.
In 2016, Atlético bought the City-owned Olympic Stadium for €30.4 million.
In 2018, Atlético Madrid secured their third UEFA Europa League title and third UEFA Super Cup victory.
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