North Korea

North Korea's military is the fourth largest globally.

An excerpt from the article 24 facts about North Korea

Over 1.28 million soldiers are in active service and almost 6.5 million are reserve and paramilitary troops. This means that 5.04% of citizens are active soldiers. Taking into account only the number of people associated with the army, the DPRK with 25 million people has almost twice as many people as China with 1.4 billion people.