Military branches:
Armed Forces of Sao Tome and Principe (Forcas Armadas de Sao Tome e Principe, FASTP): Army, Coast Guard of Sao Tome e Principe (Guarda Costeira de Sao Tome e Principe, GCSTP; also called "Navy"), Presidential Guard, National Guard (2015)

Military service age and obligation:
18 is the legal minimum age for compulsory military service; 17 is the legal minimum age for voluntary service (2012)

Military - note:
Sao Tome and Principe's army is a tiny force with almost no resources at its disposal and would be wholly ineffective operating unilaterally; infantry equipment is considered simple to operate and maintain but may require refurbishment or replacement after 25 years in tropical climates; poor pay, working conditions, and alleged nepotism in the promotion of officers have been problems in the past, as reflected in the 1995 and 2003 coups; these issues are being addressed with foreign assistance aimed at improving the army and its focus on realistic security concerns; command is exercised from the president, through the Minister of Defense, to the Chief of the Armed Forces (infantry, technical issues) and the Chief of the General Staff (logistics, administration, finances) (2012)