Gallery: Army-Navy game march on

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  • An Army Cadet signals Cadets as they march onto the field before an NCAA college football game against Navy, Saturday, Dec. 12, 2015, in Philadelphia. (AP Photo/Matt Rourke)
  • Army Cadets march onto the field before an NCAA college football game against Navy, Saturday, Dec. 12, 2015, in Philadelphia. (AP Photo/Matt Slocum)
  • Army Cadets march onto the field before an NCAA college football game against Navy, Saturday, Dec. 12, 2015, in Philadelphia. (AP Photo/Matt Rourke)
  • Navy Midshipmen march onto the field before an NCAA college football game against Army, Saturday, Dec. 12, 2015, in Philadelphia. (AP Photo/Matt Rourke)
  • Dec 12, 2015; Philadelphia, PA, USA; Army Black Knights cadets march across the field prior the game against the Navy Midshipmen at Lincoln Financial Field. Mandatory Credit: Tommy Gilligan-USA TODAY Sports
  • Dec 12, 2015; Philadelphia, PA, USA; Army Black Knights cadence stand on the field during the pregame march-on before the start of the game against the Navy Midshipmen at Lincoln Financial Field. Mandatory Credit: Tommy Gilligan-USA TODAY Sports
  • Army Cadets stand in formation before an NCAA college football game Navy, Saturday, Dec. 12, 2015, in Philadelphia. (AP Photo/Matt Slocum)
  • Dec 12, 2015; Philadelphia, PA, USA; Army Black Knights cadence stand on the field during the pregame march-on before the start of the game against the Navy Midshipmen at Lincoln Financial Field. Mandatory Credit: Tommy Gilligan-USA TODAY Sports
  • Dec 12, 2015; Philadelphia, PA, USA; Army Black Knights cadets march onto the field for the pregame march-on before the Navy Midshipmen at Lincoln Financial Field. Mandatory Credit: Tommy Gilligan-USA TODAY Sports
  • Navy Midshipmen march onto the field before an NCAA college football game against Army Saturday, Dec. 12, 2015, in Philadelphia. (AP Photo/Matt Slocum)
  • Army Cadets math onto the field before an NCAA college football game against Navy Saturday, Dec. 12, 2015, in Philadelphia. (AP Photo/Matt Slocum)
  • A group of Navy Midshipmen ran the game football to the stadium during the Army Navy football game at Lincoln Financial Field in Philadelphia, PA on December 12, 2015. (Alan Lessig/Staff)
  • Army cadets run back to their side of the field after being released in the annual prisoner exchange before the Army Navy football game at Lincoln Financial Field in Philadelphia, PA on December 12, 2015. (Alan Lessig/Staff)
  • West Point Cadets before the start of the Army Navy football game at Lincoln Financial Field in Philadelphia, PA on December 12, 2015. (Alan Lessig/Staff)
  • West Point Cadets and Navy midshipmen fight over an Army sign before the start of the Army Navy football game at Lincoln Financial Field in Philadelphia, PA on December 12, 2015. (Alan Lessig/Staff)
  • The Navy Leap Frogs jump into the stadium before the Army Navy football game at Lincoln Financial Field in Philadelphia, PA on December 12, 2015. (Alan Lessig/Staff)
  • Army Golden Knights jump into the stadium before the Army Navy football game at Lincoln Financial Field in Philadelphia, PA on December 12, 2015. (Alan Lessig/Staff)
  • Army Apache helicopters fly over the Army Navy football game at Lincoln Financial Field in Philadelphia, PA on December 12, 2015. (Alan Lessig/Staff)