Related Clues:

• Increase in intensity
• Increase, as production
• Join the forces
• Recruit
• Increase by degrees
• Join the army
• Make your presence known
• Sign up (for)
• Promotion
• Prepare to serve
• Sign for a hitch
• Not wait to be drafted
• Sign up to serve
• Gain the support of
• Respond to an 'I Want You' poster