"Opportunities for deception in football are limited."
Just as in warfare, some coaches and teams rely more on speed or power than upon deception. Some teams try to combine these factors. Think about a good wishbone quarterback coming down the line working the triple option. I think Sun would approve.
"There is a second, overwhelming difference between football and warfare. In football, every play is designed to defeat the plans of the opponent."
I wouldn't go to far with this analogy without first defining 'defeat the plans of the enemy'. Not every play in football is designed to produce a touchdown or to win the game.
My point is that warfare is far less structured, and, of course, more important and more harmful. When you play for keeps, the rules go out the window.
John / Billybob