Samoa
none; note - some EEZ demarcations, including the one with
American Samoa, are undefined

San Marino
none

Sao Tome and Principe
none

Saudi Arabia
nomadic groups on border region with Yemen resist
demarcation of boundary; Kuwait and Saudi Arabia have been
negotiating a long-contested maritime boundary with Iran; because
the treaties have not been made public, the exact alignment of the
boundary with the UAE is still unknown and labeled approximate

Senegal
separatist war in Casamance region results in refugees and
cross-border raids, arms smuggling, other illegal activities, and
political instability in Guinea-Bissau

Serbia and Montenegro
the Albanian government calls for the
protection of the rights of ethnic Albanians outside its borders in
the Kosovo region of Serbia and Montenegro while continuing to seek
regional cooperation; several ethnic Albanian groups in Kosovo voice
union with Albania; has delimited about half of the boundary with
Bosnia and Herzegovina, but sections along the Drina River remain in
dispute; in late 2002, Serbia and Montenegro and Croatia adopted an
interim agreement to settle the disputed Prevlaka Peninsula,
allowing the withdrawal of the UN monitoring mission (UNMOP), but
discussions could be complicated by the inability of Serbia and
Montenegro to come to an agreement on the economic aspects of the
new federal union

Seychelles
claims the Chagos Archipelago (UK-administered British
Indian Ocean Territory)

Sierra Leone
large UN peacekeeping presence ended civil war but
rebel gang fighting, ethnic rivalries, illegal diamond trading,
corruption, and refugees spill over into neighboring states beset
with their own civil disorder, refugees, and violence

Singapore
disputes with Malaysia over deliveries of fresh water to
Singapore, Singapore's land reclamation works on Johor, maritime
boundaries, and Singapore-occupied Pedra Branca Island/Pulau Batu
Putih persist - parties agree to ICJ arbitration on island dispute
within three years

Slovakia
small boundary changes made with Poland in 2003; Hungary
has yet to amend status law extending special social and cultural
benefits to ethnic Hungarians in Slovakia, who protest the law