word | | Military service age and obligation |
| conscription | Serbia | 18 years of age for voluntary military service; conscription abolished effective December 2010; service obligation - 6 months, with reserve obligation to age 60 for men and age 50 for women (2011) |
| conscription | Seychelles | 18 years of age for voluntary military service (younger with parental consent); no conscription (2010) |
| conscription | Sierra Leone | 17 years 6 months of age for male and female voluntary military service (younger with parental consent); no conscription; candidates must be HIV negative (2009) |
| conscription | Sint Maarten | no conscription (2010) |
| conscription | Slovakia | 18-30 years of age for voluntary military service; no conscription; women are eligible to serve (2011) |
| conscription | Slovenia | 18-25 years of age for voluntary military service; conscription abolished in 2003 (2010) |
| conscription | South Sudan | ... were estimated to still be active at the end of that year; in April 2011, a conscription program was being implemented to thwart recruitment of military-aged males into other armed groups ... |
| conscription | Swaziland | 18-30 years of age for male and female voluntary military service; no conscription; compulsory HIV testing required, only HIV-negative applicants accepted (2011) |
| conscription | Sweden | ... the Swedish Parliament has abolished compulsory military service, with exclusively voluntary recruitment as of July 2010; conscription remains an option in emergencies; after completing initial service, soldiers have a reserve commitment until ... |
| conscription | Timor-Leste | 18 years of age for voluntary military service; no conscription; 18-month service obligation (2011) |
| conscription | Tonga | 16 years of age for voluntary enlistment (with parental consent); no conscription (2010) |
| conscription | Trinidad and Tobago | 18 years of age for voluntary military service (16 years of age with parental consent); no conscription (2010) |