加爾各答足球聯賽

Early years (1890s–1910s)

In 1898, IFA introduced a two-tiered football league in Calcutta on the lines of English Football League in England and Wales. Until 1937, CFL was a major tournament with participation open to every team across the nation but after the establishment of AIFF, CFL became a regional competition.

The British Indian Army garrison stationed at Fort William played an instrumental role in shaping the Calcutta Football League by putting forth numerous teams alongside other European settlers. The Army teams won all but twelve of the titles until 1933. On eight of those twelve occasions the title was claimed by Calcutta and the rest by Dalhousie. Native teams were barred from participating for the first 15 seasons, and only clubs designated for civil servants, merchants, missionaries and other European nationalities made up the rest of the league, in a clearly designed exercise to exclude Indians of any religion.

In 1914, IFA permitted only two native clubs, Mohun Bagan and Aryan, in the Second Division of CFL. Mohun Bagan had a successful campaign and earned promotion to the Premier Division in their debut season, whereas Aryan was promoted to the top division two years later. From 1917 to 1920, the Second Division was won by two other native clubs, namely Kumortuli Club (in 1917, 1918 and 1919) and Town Club (in 1920), but their promotions were denied due to the allowance of only two native clubs to play in each tier.

Uprise of native dominance (1920s–1947)

1921 saw the rise of East Bengal who began their CFL journey in the Second Division in place of Tajhat Club who had withdrawn from the league. Three years later East Bengal finished the Second Division as the joint-winners with Cameroons B and since Cameroons A was in the Premier Division, East Bengal got the opportunity for promotion. As two native clubs were already playing in the Premier Division, East Bengal's promotion was to be rejected as well. At this, the club called for amendments and in the following General Meeting of IFA, the nine British teams conveyed their approval, while Mohun Bagan and Aryan opposed it. Eventually the rule regulating the promotion of native clubs was abolished by majority.

Even though the native clubs got more opportunities yet the British dominance continued till 1933. In 1934, Mohammedan won the title in their debut season and became the first native club to win CFL. The club went on to win the league six out of seven times from 1935 to 1941, with 1939 being the only exception when they did not participate and Mohun Bagan went away with their first league title that year.

Post-independence era (1947–1970s)

In the post-independence years, many other state leagues were introduced and various clubs from other states rose in glory, but CFL was still considered to be one of the top leagues in the nation and provided innumerable young talents. The league matches were mostly played in monsoon and matches involving the Big Three of Calcutta (Mohun Bagan, East Bengal and Mohammedan) regularly attracted more than 30,000 spectators. From 1934 to 1981, Eastern Railway was the only club outside of the Big Three to win the title in 1958.

The CFL had a long history of crowd trouble, and the burgeoning fanfare exacerbated it. The rapidly increasing off-the-field rivalry between the respective fans of Mohun Bagan and East Bengal saw one of the darkest days of Indian football when 16 fans lost their lives because of a stampede and rioting during a Kolkata Derby in CFL on 16 August 1980 in Eden Gardens. Since then the day is celebrated every year as the Football Lover's Day.

Years of obscurity (1980s–2000s)

In the 80s and 90s, the league caught many eyes with the rivalry between the two of Indian football's finest tacticians— P.K. Banerjee and Amal Dutta, besides the decades old rivalry among the Big Three.

Due to the rise in financial demands and steady modernisation of the sport, the league became dominated by the Big Three clubs as the smaller clubs struggled to keep up with their economy. The league saw the beginning of a major downfall with the introduction of NFL (now I-League). The importance of regional competitions decreased as all the top clubs in the state were racing for the national honours. From the later 20th century, Mohammedan eventually lost its stronghold and, Mohun Bagan and East Bengal became the only dominant teams in the league. In the new century, the IFA revamped the competition into a six-tier competition with the seventh tier, called the nursery league, reserved for sub-junior teams. The top tier, Premier Division, was also divided into two groups so as to include more teams.

Resurgence (2010s–present)

Starting in 2010, East Bengal won a record eight consecutive titles until their arch-rivals Mohun Bagan broke the streak in 2018. In 2018, the league's popularity had a sudden upsurge and recorded more than 15,000 spectators even in matches involving small clubs. Most news reports in the local media reverberated the popular feeling— "The passion of the 70s is back." Small clubs like Peerless and George Telegraph introduced some of the foreign talents that later went on to become big names in the country.

In 2019, Peerless clinched the honour and became the second team outside the Big Three after Eastern Railway to win the league since 1958. Since the independence of India, the CFL was never cancelled until 2020 when after a lengthy delay due to the COVID-19 pandemic it was decided to cancel the then CFL season.