Simplify the following text for a Grade 12 native English-speaking person.
Original: During the Monday Night Wars , the World Wrestling Federation ( WWF ) and World Championship Wrestling ( WCW ) , the two top North American wrestling promotions , competed for ratings .
Simplified: During the Monday Night Wars , the World Wrestling Federation ( WWF ) and World Championship Wrestling ( WCW ) , the top 2 North American wrestling shows , competed for ratings .