Dear members,
Thanks for the timely response. Here is what I could find more:
"Despite its long isolation, Bhutan was the object of several
foreign invasions over the centuries. In 1720 a Chinese imperial
army invaded Tibet and established suzerainty over both Tibet and
Bhutan. Control over Bhutan changed several times thereafter, and
the country's exact territorial extent was not clear. The British
intervened in Bhutan in 177273 and again in 186465, at which time
the defeated Bhutanese signed a treaty ceding control of their
southern border passes to the British." [...] "In August 1949 Bhutan
concluded a treaty with India in which the latter newly independent
nation took over Britain's role toward Bhutan. As part of this
arrangement, India paid an annual subsidy to Bhutan, and a strip of
land in Assam, known as the Dewangiri, was transferred to Bhutan."
[...]"China's suppression of Tibetan Buddhism in Tibet and its vague
assertions to sovereignty over some Bhutanese territory lent urgency
to the Chinese threat, and in the 1950s India took measures to
strengthen its defensive garrisons along Bhutan's northern border
with Tibet." [from: "Bhutan." Encyclopædia Britannica. 2005.
Encyclopædia Britannica Online
27 June 2005 <
http://search.eb.com/eb/article?tocId=25008>. ]
"1730
Bhutan aids Raja of Cooch Behar against Indian Mughals.
1760s
Cooch Behar becomes de facto Bhutanese dependency; Assam Duars
come under Bhutanese control.
1770
Bhutan-Cooch Behar forces invade Sikkim.
1772
Cooch Behar seeks protection from British East India Company.
1772-73
British forces invade Bhutan.
1774
Bhutan signs peace treaty with British East India Company.
1787
Boundary disputes plague Bhutanese-Indian relations.
1826-28
Border tensions between Bhutan and British increase after
British seize Lower Assam, threaten Assam Duars.
1834-35
British invade Bhutan.
1841
British take control of Bhutanese portion of Assam Duars and
begin annual compensation payments to Bhutan.
1862
Bhutan raids Sikkim and Cooch Behar.
1864
Civil war waged in Bhutan; British seek peace relationship
with both sides.
1864-65
Duar War waged between Britain and Bhutan.
1865
Treaty of Sinchula signed; Bhutan Duars territories ceded to
Britain in return for annual subsidy." [...]
"1910
China invades Tibet, laying claim to Bhutan, Nepal, and
Sikkim; Treaty of Punakha signed with Britain, stipulating
annual increase of stipend and Bhutan's control of own
internal affairs." [...]
and, finally:
"The massive Tibetan uprisings in 1959 and the flight to India of
the Dalai Lama, as well as the heightened presence of Chinese forces
on the ill-defined frontier, alerted Bhutan to the potential threat
it faced, and its representative in Tibet was withdrawn. Included in
the territory occupied by the Chinese People's Liberation Army were
the eight western Tibetan enclaves administered by Bhutan since the
seventeenth century. New Delhi intervened with Beijing on behalf of
Thimphu regarding the enclaves, but the Chinese refused to discuss
what they considered a matter between China and Bhutan. "
So, as it shows, it looks like the question remains opened.
There are geological maps on google, but not political ones for
Bhutan.
Regards,
Lucas