A more thorough explanation:

Military leave is a policy that allows someone who is serving in the U.S. armed forces to take a long-term leave of absence from their job without losing their benefits. This policy is usually included in employment policies or collective-bargaining agreements.

• John is a member of the National Guard and is called to active duty for six months. His employer has a military leave policy that allows him to take the time off without losing his job or benefits.
• Sarah is a reservist and is called to serve overseas for a year. Her employer has a military leave policy that allows her to take the time off and return to her job when she comes back.

These examples illustrate how military leave works. In both cases, the employees are able to take a long-term leave of absence to serve their country without worrying about losing their job or benefits. This policy is important because it allows people to serve in the military without sacrificing their civilian careers.