The most difficult military tasks are given to highly trained soldiers who make up special forces teams in many nations. These units first appeared in the 20th century, but during World War II, when each army participating in the conflict established its own special operations, they became more common. Only a small number of the most difficult recruits are selected as members of these forces, and their training is rigorous. Some of the world’s most impressive special forces are as follows:

The Special Air Service (SAS) of the British Army, which was established in 1950, is a distinguished special forces unit that specializes in a variety of operations, including hostage rescue, covert reconnaissance, and counterterrorism. With a success rate of only 15% to 20%, the selection process is extremely competitive. In most cases, fewer than 30 people will be selected to participate in training out of 200 applicants.