Saudi Arabia
18 years of age (est.); no conscription (2004)
Senegal
18 years of age for compulsory and voluntary military
service; conscript service obligation - 2 years (2004)
Serbia
19-35 years of age for male compulsory military service;
under a state of war or impending war, conscription can begin at age
16; conscription is to be abolished in 2010; 6-month service
obligation, with a reserve obligation to age 60 for men and 50 for
women (2007)
Seychelles
18 years of age for voluntary military service (younger
with parental consent); no conscription (2008)
Sierra Leone
17 years 6 months of age for voluntary military service
(younger with parental consent); no conscription (2008)
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
are eligible to serve in noncombat roles; 2-year service obligation
(2007)
Spain
20 years of age (2004)