word | | Military service age and obligation |
| age | Nicaragua | 17 years of age for voluntary military service; tour of duty 18-36 months (2008) |
| age | Niger | 17-21 years of age for voluntary military service; 2-year service term; women may serve in health care (2008) |
| age | Nigeria | 18 years of age for voluntary military service (2007) |
| age | Norway | 18-44 years of age for male compulsory military service; 16 years of age in wartime; 17 years of age for male volunteers; 18 years of age for women; 12-month service obligation ... |
| age | Oman | 18-30 years of age for voluntary military service; no conscription (2008) |
| age | Pakistan | 17-23 years of age for voluntary military service; soldiers cannot be deployed for combat until age 18; the Pakistani Air Force and Pakistani Navy have inducted their first female pilots and sailors ... |
| age | Papua New Guinea | 16 years of age for voluntary military service (with parental consent); no conscription (2008) |
| age | Paraguay | 18 years of age for compulsory and voluntary military service; conscript service obligation - 12 months for Army, 24 months for Navy (2007) |
| age | Peru | 18-30 years of age for voluntary male and female military service; no conscription (2008) |
| age | Philippines | 18-25 years of age (officers 21-29) for compulsory and voluntary military service; applicants must be single male or female Philippine citizens (2007) |
| age | Poland | 18-28 years of age for male voluntary or compulsory military service; service obligation shortened from 12 to 9 months in 2005; conscription is to end in 2012; only soldiers who have completed ... |
| age | Portugal | 18 years of age for voluntary military service; compulsory military service ended in 2004; women serve in the armed forces, on naval ships since 1993, but are prohibited from serving in some ... |
| age | Qatar | 18 years of age for voluntary military service; no conscription (2008) |