The 25 largest militaries in the world, ranked by the number of active troops

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Military parade in Kim Il Sung Square in Pyongyang, capital of the Democratic People's Republic of Korea (DPRK). The Democratic People's Republic of Korea (DPRK) staged a military parade marking the 60th anniversary of the founding of the nation.
North Korea has the fourth-largest number of active armed forces in the world.

Alain Nogues/Corbis via Getty Images

Plummeting fertility rates are making Asian countries worry about running out of soldiers

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The South Korean flag on army uniforms.
South Korea, which has the world's lowest fertility rate, has military conscription of at least 18 months.

Im Yeongsik/Getty Images

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