Related Clues:

• Ground force group
• Some oxygen sources
• Does very poorly, in slang
• Armored vehicles
• Oxygen sources
• Loses on purpose
• War zone rumblers
• Fails completely
• Sleeveless shirts
• Sherman and Patton
• Vehicles with caterpillar treads
• Does badly at the box office
• Aquaria
• Combat vehicles
• Does poorly