Bolivia
Chile rebuffs Bolivia's reactivated claim to restore the
Atacama corridor, ceded to Chile in 1884, offering instead
unrestricted but not sovereign maritime access through Chile for
Bolivian natural gas and other commodities

Bosnia and Herzegovina
Bosnia and Herzegovina and Serbia and
Montenegro have delimited most of their boundary, but sections along
the Drina River remain in dispute; discussions continue with Croatia
on several small disputed sections of the boundary

Botswana
commission established with Namibia has yet to resolve
small residual disputes along the Caprivi Strip, including the
Situngu marshlands along the Linyanti River; downstream Botswana
residents protest Namibia's planned construction of the Okavango
hydroelectric dam at Popavalle (Popa Falls); Botswana has built
electric fences to stem the thousands of Zimbabweans who flee to
find work and escape political persecution; Namibia has long
supported and in 2004 Zimbabwe dropped objections to plans between
Botswana and Zambia to build a bridge over the Zambezi River,
thereby de facto recognizing their short, but not clearly delimited
Botswana-Zambia boundary

Bouvet Island
none

Brazil
unruly region at convergence of Argentina-Brazil-Paraguay
borders is locus of money laundering, smuggling, arms and illegal
narcotics trafficking, and fundraising for extremist organizations;
uncontested dispute with Uruguay over certain islands in the
Quarai/Cuareim and Invernada boundary streams and the resulting
tripoint with Argentina; in 2004 Brazil submitted its claims to
UNCLOS to extend its maritime continental margin

British Indian Ocean Territory
Mauritius and Seychelles claim the
Chagos Archipelago and its former inhabitants, who reside chiefly in
Mauritius, but in 2001 were granted UK citizenship and the right to
repatriation since eviction in 1965; the UK resists the Chagossians'
demand for an immediate return to the islands; repatriation is
complicated by the exclusive US military lease of Diego Garcia that
restricts access to the largest island in the chain

British Virgin Islands
none

Brunei
in 2003 Brunei and Malaysia ceased gas and oil exploration in
their disputed offshore and deepwater seabeds and negotiations have
stalemated prompting consideration of international legal
adjudication; Malaysia's land boundary with Brunei around Limbang is
in dispute; Brunei established an exclusive economic fishing zone
encompassing Louisa Reef in southern Spratly Islands in 1984 but
makes no public territorial claim to the offshore reefs; the 2002
"Declaration on the Conduct of Parties in the South China Sea" has
eased tensions in the Spratly Islands but falls short of a legally
binding "code of conduct" desired by several of the disputants

Bulgaria
none

Burkina Faso
two villages are in dispute along the border with
Benin; Benin accuses Burkina Faso of moving boundary pillars;
Burkina Faso border regions remain a staging area for Liberia and
Cote d'Ivoire rebels and an asylum for refugees caught in local
fighting; the Ivoirian Government accuses Burkina Faso of sheltering
Ivoirian rebels