Premise: American football strategy concerns the deployment of offensive, defensive, and special teams players and the execution of plays in American football. In American football, there are a vast array of positions, formations, strategies, plays and types of play calling systems that are utilized. If a strategy is for a particular game, it is known as a "game plan".
Hypothesis:  In American football, like international football, there are a vast array of positions, formations, strategies, plays and types of play calling systems that are utilized.