North Korean Special Operation Force

The North Korean Special Operation's Forces (SOF) are specially trained and equipped military units tailored to perform military, political, and psychological operations. Although it is unknown when they were first officially formed, their first known operations came on October 30, 1968, when Maritime commandos landed on beaches in South Korea and after a series of battles, retreated back to North Korea. Their missions are to breach the fixed defenses of South Korea, to create a "second front﻿" behind the enemy's rear, and to conduct battlefield and strategic reconnaissance. There are about 200,000 soldiers in the North Korean SOF, making it the largest special operations group in the world.

(From Deadliest Warrior Wiki)