word | | Military service age and obligation |
| military | Azerbaijan | men between 18 and 35 are liable for military service; 18 years of age for voluntary military service; length of military service is 18 months and 12 months for university graduates (2006) |
| military | Bahrain | 17 years of age for voluntary military service; 15 years of age for NCOs, technicians, and cadets; no conscription (2008) |
| military | Bangladesh | 16 years of age for voluntary military service; 17 years of age for officers (both with parental consent); conscription legally possible in emergency, but has never been implemented (2008) |
| military | Barbados | 18 years of age for voluntary military service (younger requires parental consent); no conscription (2008) |
| military | Belarus | 18-27 years of age for compulsory military service; conscript service obligation - 18 months (2005) |
| military | Belgium | 18 years of age for voluntary military service; conscription suspended (2008) |
| military | Belize | 18 years of age for voluntary military service; laws allow for conscription only if volunteers are insufficient; conscription has never been implemented; volunteers typically outnumber available positions by 3:1 (2008) |
| military | Benin | 21 years of age for compulsory and voluntary military service; in practice, volunteers may be taken at the age of 18; both sexes are eligible for military service; conscript tour of duty ... |
| military | Bhutan | 18 years of age for voluntary military service; no conscription (2008) |
| military | Bolivia | 18 years of age for 12-month compulsory military service; when annual number of volunteers falls short of goal, compulsory recruitment is effected, including conscription of boys as young as 14; 15-19 ... |
| military | Bosnia and Herzegovina | 17 years of age for voluntary military service in the Federation and in the Republika Srpska; conscription abolished January 2006; 4-month service obligation (2006) |
| military | Botswana | 18 is the apparent age of voluntary military service; the official qualifications for determining minimum age are unknown (2001) |
| military | Brazil | 21-45 years of age for compulsory military service; conscript service obligation - 9 to 12 months; 17-45 years of age for voluntary service; an increasing percentage of the ranks are "long-service" volunteer ... |
| military | Brunei | 18 years of age (est.) for voluntary military service; non-Malays are ineligible to serve (2007) |
| military | Bulgaria | 18-27 years of age for voluntary military service; conscript service obligation - 9 months; as of May 2006, 67% of the Bulgarian Army comprised of professional soldiers; conscription ended as of 1 January ... |
| military | Burkina Faso | 18 years of age for compulsory military service; 20 years of age for voluntary military service (2001) |
| military | Burma | 18 years of age for voluntary military service for both sexes; forced conscription of children, although officially prohibited, reportedly continues (2007) |
| military | Burundi | 16 years of age for compulsory and voluntary military service; children as young as 10 years of age have been conscripted into the armed forces; the enrollment of children is still not ... |
| military | Cambodia | conscription law of October 2006 requires all males between 18-30 to register for military service; 18-month service obligation (2006) |
| military | Cameroon | 18 years of age for voluntary military service; no conscription; the government makes periodic calls for volunteers (2006) |
| military | Canada | 17 years of age for male and female voluntary military service (with parental consent); 16 years of age for reserve and military college applicants; Canadian citizenship or permanent residence status required; maximum ... |
| military | Cape Verde | 18 years of age (est.) for selective compulsory military service; 14-month conscript service obligation (2006) |
| military | Central African Republic | 18 years of age for compulsory and voluntary military service; 2-year conscript service obligation (2006) |
| military | Chad | ... of age for volunteers; no minimum age restriction for volunteers with consent from a guardian; women are subject to 1 year of compulsory military or civic service at age of 21 (2004 |