When you get 10 yards ahead of the original line of scrimmage
A first down :P
you must move any part of the ball over the chain
In Canadian football, a team has only three downs to make a first down. That's why Canadian football is a "wide open" game, unlike the more static game that's played in the US.
The Arena Football League was first started from an idea of an indoor football game. The first game was played in 1987. The first test game was played in Rockford Illinois.
The first American football game filmed was between the University of Michigan and the University of Chicago in 1904. Click on the 'First Filmed American Football Game' link on this page to read about the game.
A field goal can be kicked during a football game on any down, but it is most commonly attempted on fourth down.
The specification of the first football were laid down in 1872. The first footballs were used by Football association who played at that time.
The first successful filming of a College Football game was in 1904 at a game between the University of Michigan and the University of Chicago.
from egypt
kickoff.
rutegers
about the 1920