(Spoiler Alert! Answer at bottom)



Step 1: Identify the countries;) South Korea, Israel, Singapore.
These 3 countries are all:
- first world / developed countries with very high economic growth
- small in area and population
- ranked in the top ten for active military per 1000 people
- have a draft requiring men (south korea and singapore) or men and women (israel) to spend 18+ months in the army full time and then participate in the reserves
- have high ratios of reserve troops to active troops, with large portions of the population participating in the reserve army
- have hostile relations with neighbors or have been invaded by neighbors in the past (singapore by japan)
Further Reading:

