For the first time this season, all three Commander in Chief’s Trophy contenders will play home games on the same day: Army West Point hosting Tulane at Michie Stadium, Air Force battling Utah State in Colorado Springs, and Navy facing Southern Methodist in Annapolis, the newly minted hip-hop capital of Maryland. Six things you should know about a home-cooked Saturday afternoon: 1. Navy and the CFP. After the Mids’ 45-20 upset win over Memphis last weekend, Navy found itself 20th in the College Football Playoff rankings, which will determine the four semifinalists that compete for the national championship and will set…