Botswana
18 years of age; universal
Brazil
voluntary between 16 and 18 years of age and over 70;
compulsory over 18 and under 70 years of age
British Virgin Islands
18 years of age; universal
Brunei
none
Bulgaria
18 years of age; universal
Burkina Faso
universal
Burma
18 years of age; universal
Burundi
NA years of age; universal adult
Cambodia
18 years of age; universal
Cameroon
20 years of age; universal