WORLD’S LARGEST ARMIES FROM THE USA, CHINA, S KOREA, INDIA, N KOREA, ISRAEL, PAKISTAN, RUSSIA, VIETNAM, AND TURKEY IN THIS ORDER CAN FIELD FROM 1.3 MILLION DOWN TO 400,000 PERSONNEL

There are over three dozen armies around the world with more than 100,000 soldiers. Arguably, the United States has the world's largest army, combining the troops of the US Army and the US Marine Corps. While the US Army is not a marine corps, the US Marine Corps is an army by any usable definition of the term. While the Marines might quibble, the distinction was probably lost on the enemy in Iraq or Afghanistan.

http://www.globalsecurity.org/military/world/armies.htm

ANNUAL REPORT TO CONGRESS

Military and Security Developments Involving the People’s Republic of China 2015

http://www.defense.gov/Portals/1/Documents/pubs/2015_China_Military_Power_Report.pdf