As most a fan of college football in America, I am not familiar with Association football.
Same here, I never knew association football was known as soccer as well, with 11 players on the field.
What countries are associated with this "association football" league?
The Laws of soccer were originally made back in 1863 in England, but now soccer is enjoyed by the whole world. 
I saw a major increase in the popularity of soccer in the United States in the late 1980s.
Soccer in the United States
Soccer in the United States is governed by different organizations. The United States Soccer Federation governs most levels of soccer in the country, including the national teams, professional leagues, and amateur leagues. The NCAA governs colleges and the National Federation of High Schools governs schools. The match regulations are generally the same between the three governing bodies although there are many subtle differences.
, over 24.4 million people play soccer in the United States. In 2017, Gallup reported that soccer was the third-
Outline of association football
The following outline is provided as an overview of and topical guide to association football:
Association football – sport played between two teams of eleven players with a spherical ball. At the turn of the 21st century, the game was played by over 250 million players in over 200 countries, making it the world's most popular sport. More commonly known as football or soccer.
What type of thing is association football?
Association football can be described as all of the following:
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