More people are joining the military. A shaky US job market could be boosting the numbers.

US military services are seeing a jump in recruitment, raising questions about what's driving the increase. Recruiting officials say it's complicated.

Sgt. Salvador Castro/US Army

• After years of shortfalls, military recruiting numbers are seeing a jump.
• Economic factors like unemployment rates and job openings impact military recruitment.
• Recruiting officials say the factors helping drive recruitment are complex.

Military recruiting numbers are up — the Army...