Under the Cooch Behari agreement with the…

Under the Cooch Behari agreement with the British, a British expeditionary force drives the Bhutanese garrison out of Cooch Behar and invades Bhutan in 1772-73.

The druk desi petitions Lhasa for assistance from the Panchen Lama, who is serving as regent for the youthful Dalai Lama.

In correspondence with the British governor general of India, however, the Panchen Lama instead castigated the druk desi and invokes Tibet's claim of suzerainty over Bhutan.