Budget: $62.3 billion
Active frontline personnel: 624,465
Total aircraft: 1,412
South Korea has been left with little choice but to have a large and capable military in the face of potential North Korean aggression. With those realities in mind, South Korea has a number of submarines, attack helicopters, and active personnel.
The country also has numerous tanks and the sixth-largest air force in the world.
Members of South Korea's special forces participate in military training.