Marc Firlie calls comparisons between football and warfare a cliche.

But he says the challenges of playing football at the U.S. Naval Academy — on top of a full academic course load and year-round military training — really did help prepare him for his work on board a guided-missile cruiser helping to enforce the no-fly zones over Iraq after the 1991 Persian Gulf War.

"You don't really appreciate it — or like it — when you're 17," says Firlie, who grew up in Cumberland and now lives in Timonium. "Later on, you realize what it's doing for you."

The Navy seniors who line up against Army at FedEx Field in Landover on Saturday likely will be playing their last game in organized football. While other Division I players are preparing for contracts and careers in the NFL, the midshipmen can look forward to commissions as junior officers in the Navy or Marine Corps.

On enrolling at Annapolis — or West Point, or the Air Force Academy in Colorado Springs — students commit to serving five years after graduation on active duty.

"They know where they're going to be six months from now, and it's probably going to be in a hot, dirty, lousy spot that you and I wouldn't want to be in," says retired Rear Adm. Thomas C. Lynch, who captained the 1963 team and became the academy's 54th superintendent.

With that future in mind, Lynch says, the academy uses football as a means to an end — "not the end itself."

"The purpose is not to produce football players," he says. "It's to produce commissioned officers and leaders in our Navy and Marine Corps — and leaders for the future of this country."

Head coach Ken Niumatalolo says the responsibility "weighs heavily" on him.

"I'm a football coach, and I want to win in the worst way," he says. "But more importantly, I feel a great obligation and duty. … The things I'm trying to teach, the lessons that they learn on the football field, will hopefully be lessons that will help them be better leaders and better fathers and husbands."

Lynch speaks approvingly of Niumatalolo's decision to suspend captain Alexander Teich for a game this season after the senior fullback reportedly left the field following a loss to Air Force before singing the Falcons' alma mater.

"Why?" Lynch asks. "Because it's more than just football. … And he learned from that, and he's going to be a better officer because of it."

Not that the players always recognize the lasting value of what they're learning at the time. As a midshipman at the academy and a safety on the football team, Lt. Cmdr. Chris Lepore says, he internalized the habits of preparation, practice, attention to detail and discipline.

"I knew that those skills and attributes were what was needed in order to be successful on the football field," says the 2001 graduate, now an intelligence officer with SEAL Team Three in Coronado, Calif. "What I quickly learned was you can apply those skills and attributes and characteristics in the real world."

Retired Vice Adm. Albert M. Calland III remembers a 1972 game against Notre Dame. The Irish had won the previous eight meetings, and from the opening kick — returned 84 yards for a touchdown — it was clear they had every intention of making it nine.

By halftime, the scoreboard read 35-0.

Then the Midshipmen began their comeback. Quarterback Al Glenny connected with Calland, a wide receiver, on a pair of touchdowns, and ran the ball himself for a third. The defense, meanwhile, held their opponents to just one more touchdown. The final score: Notre Dame 42, Navy 23.

Calland, who would go on to lead the Navy SEALs, says games against the larger, faster and more athletic teams that filled Navy's schedule then and now helped to prepare him and his fellow future officers for the challenges that would lie ahead.

"Any time you go on a mission in a SEAL team environment, you're going with very small numbers. Potentially you're going to run into a much larger force and face some adversity," he says. "Overcoming that adversity and not quitting is what it's all about."