word | | Military branches |
| Force | Rwanda | Rwandan Defense Force (RDF): Rwandan Army (Rwandan Land Force), Rwandan Air Force (2011) |
| Force | Saint Kitts and Nevis | Royal Saint Kitts and Nevis Defense Force (includes Coast Guard), Royal Saint Kitts and Nevis Police Force; for national security, Saint Kitts and Nevis relies on the Regional Security System, headquartered in ... |
| Force | Saint Lucia | no regular military forces; Royal Saint Lucia Police Force (includes Special Service Unit and Coast Guard) (2010) |
| Force | Saint Vincent and the Grenadines | no regular military forces; Royal Saint Vincent and the Grenadines Police Force, Coast Guard; for national defense, Saint Vincent relies on the Regional Security System, headquartered in Barbados (2010) |
| Force | Samoa | no regular military forces; Samoa Police Force (2008) |
| Force | San Marino | no regular military forces; voluntary Military Force (Corpi Militari) performs ceremonial duties and limited police support functions (2010) |
| Force | Saudi Arabia | ... Saudi Land Forces, Royal Saudi Naval Forces (includes Marine Forces and Special Forces), Royal Saudi Air Force (Al-Quwwat al-Jawwiya al-Malakiya as-Sa'udiya), Royal Saudi Air Defense Forces, Royal ... |
| Force | Senegal | Senegalese Armed Forces: Army, Senegalese Navy (Marine Senegalaise), Senegalese Air Force (Armee de l'Air du Senegal) (2009) |
| Force | Seychelles | Seychelles Defense Force: Army, Coast Guard (includes Naval Wing, Air Wing), National Guard (2005) |
| Force | Singapore | Singapore Armed Forces: Army, Navy, Air Force (includes Air Defense) (2010) |
| Force | Sint Maarten | ... main operating base on Curacao and through a detachment on Sint Maarten; other local security forces include a coast guard, paramilitary National Guard (Vrijwilligers Korps Sint Maarten), and Police Force (KPSM) (2010 |
| Force | Solomon Islands | no regular military forces; Solomon Islands Police Force (2011) |
| Force | Somalia | National Security Force (NSF): Somali Army (2011) |