Exactly that: leagues. There is the AFL (Australian Football League), and some lower level leagues: SANFL (South Australian National Football League), WAFL (West Australian Football League), VFL...
On July the 10th, 1858, Tom Wills wrote a letter to the magazine Bells Life, calling for the creation of football teams. This is where the AFL began, or at least, this is when the game itself began...
A mark occurs when a football has been kicked at least 15 metres untouched by any other person except by the person catching it. Such a catch is referred to as "a mark". The benefit of...