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| | ipedia.com: American football Article (Site not responding. Last check: 2007-10-03) |
 | | Like most team sports (and individual sports in the context of a meet like the Olympics), American football is often seen as a metaphor for war. |
 | | Professional leagues that no longer exist include the World Football League (WFL,1974-75), the United States Football League (USFL,1983-1985), the XFL (XFL,2001), the All-America Football Conference (1946-1949), the World League of American Football (WLAF,1991-1993-now NFL Europe), and, the American Football League (AFL,1960-1969). |
 | | However, rugby league does have a similar system where each side is allowed to be tackled five times while in possession (see the entry for rugby league for an explanation of the play-the-ball and the limited tackles rule). |
| www.ipedia.com /american_football.html (5188 words) |
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