Related Clues:

• Marching force
• Their mascot is a mule
• Where an octopus may enlist?
• The NCAA's Black Knights
• General's fighting force
• Service branch
• It includes many companies
• Mass
• Grunt group
• Navy football rival
• Mule-mascot team
• Land forces
• Golfer Arnie's fans
• Military
• Ant horde