Singapore
18-21 years of age for male compulsory military service;
16 years of age for volunteers; 2-year conscript service obligation,
with a reserve obligation to age 40 (enlisted) or age 50 (officers)
(2008)
Slovakia
17-30 years of age for voluntary military service;
conscription abolished in 2006; women are eligible to serve (2007)
Slovenia
17 years of age for voluntary military service;
conscription abolished in 2003 (2007)
South Africa
18 years of age for voluntary military service; women
have a long history of military service in noncombat roles dating
back to World War I (2004)
Spain
20 years of age (2004)
Sri Lanka
18 years of age for voluntary military service (2007)
Sudan
18-30 years of age for compulsory military service; 2-year
service obligation (2006)
Suriname
18 years of age (est.); recruitment is voluntary, with
personnel drawn almost exclusively from the Creole community (2007)
Swaziland
18-30 years of age for male and female voluntary military
service; no conscription (2008)
Sweden
19 years of age for compulsory military service; conscript
service obligation: 7-15 months (Navy), 8-12 months (Air Force);
after completing initial service, soldiers have a reserve commitment
until age 47 (2006)