Bolivia–Brazil border

The boundary line crosses a variety of terrains, going from large urban areas by inhospitable deserts and forests.

This caused many clashes, since the population did not want to submit to the Bolivian government, which tried to lease the land to the Anglo-Americans.

Several riots emerged, and the situation of noncompliance lasted until 1903, when Brazil militarily occupied the territory until it finally decided the issues.

Finally the talks began and after series of proposals and counter-proposals, the Treaty of Petropolis was signed, agreed that getting through territorial compensations elsewhere in the border, the construction due to the Brazil of a railway (the Madeira-Mamoré Railway), freedom of transit by rail and by river to the Atlantic Ocean and a two million pounds compensation, Bolivia would give Acre.

This time, according to Rio Branco, a real territorial expansion was going on (since according to him the previous elections were only held the "national heritage").