Seychelles
together with Mauritius, Seychelles claims the Chagos
Archipelago (UK-administered British Indian Ocean Territory)

Sierra Leone
domestic fighting among disparate rebel groups,
warlords, and youth gangs in Guinea, Liberia, and Sierra Leone have
created insurgencies, street violence, looting, arms trafficking,
ethnic conflicts, and refugees in border areas; in 2003, Guinea and
Sierra Leone established a boundary commission to resolve a dispute
over the town of Yenga

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

Slovakia
Hungary amended its status law extending special social and
cultural benefits to ethnic Hungarians in Slovakia, many of whom had
protested the law; Slovakia and Hungary have renewed discussions on
ways to resolve differences over the Gabcikovo-Nagymaros
hydroelectric dam on the Danube, with possible resort again to the
ICJ for final resolution

Slovenia
the Croatia-Slovenia land and maritime boundary agreement,
which would have ceded most of Piran Bay and maritime access to
Slovenia and several villages to Croatia, remains controversial, has
not been ratified, and has been complicated by Croatia's declaration
of an ecological-fisheries zone in the Adriatic Sea

Solomon Islands
Australian defense personnel are dispatched at the
invitation of the Solomon Islands' Government to restore law and
order on the islands and reinforce regional security

Somalia
"Somaliland" secessionists provide port facilities to
land-locked Ethiopia and establish commercial ties with regional
states; "Puntland" secessionists clash with "Somaliland"
secessionists to establish territorial limits and clan loyalties,
each seeking support from neighboring states; Ethiopia maintains
only an administrative line with the Oromo region of southern
Somalia and maintains alliances with local Somali clans opposed to
the unrecognized Transitional National Government in Mogadishu

South Africa
managed dispute with Namibia over the location of the
boundary in the Orange River

South Georgia and the South Sandwich Islands
briefly occupied by
military force in 1982 - claimed by Argentina in constitution but
declares it will no longer seek settlement by force

Southern Ocean
Antarctic Treaty defers claims (see Antarctica
entry), but Argentina, Australia, Chile, France, NZ, Norway, and UK
assert claims (some overlapping), including the continental shelf in
the Southern Ocean; several states have expressed an interest in
extending those continental shelf claims under the United Nations
Convention on the Law of the Sea (UNCLOS) to include undersea
ridges; the US and most other states do not recognize the land or
maritime claims of other states and have made no claims themselves
(the US and Russia have reserved the right to do so); no formal
claims have been made in the sector between 90 degrees west and 150
degrees west