What is the employee's status with his or her civilian employer while performing service in the uniformed services?

Which non-seniority rights and benefits is the employee entitled to during a period of service?

If the employer provides full or partial pay to the employee while he or she is on military leave, is the employer required to also provide the non-seniority rights and benefits ordinarily granted to similarly situated employees on furlough or leave of absence?

If employment is interrupted by a period of service in the uniformed services, are there any circumstances under which the employee is not entitled to the non-seniority rights and benefits ordinarily granted to similarly situated employees on furlough or leave of absence?

If employment is interrupted by a period of service in the uniformed services, is the employee permitted upon request to use accrued vacation, annual or similar leave with pay during the service? Can the employer require the employee to use accrued leave during a period of service?