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"We are no longer citizens of the United States of America and all those who live in the five-state area that encompasses our country are free to join us,'' long-time Indian rights activist Russell Means said.
The group also visited the Bolivian, Chilean, South African and Venezuelan embassies, and would continue on their diplomatic mission and take it overseas in the coming weeks and months.
Lakota country includes parts of the states of Nebraska, South Dakota, North Dakota, Montana and Wyoming.

The new country would issue its own passports and driving licences, and living there would be tax-free - provided residents renounce their U.S. citizenship, Mr Means said.

All it will take is one or a few of these countries like China (for leverage against Taiwan), Russia (payback for Chechnya) or Venezuela (just to stick it in our eye) and this could get really ugly.

Interesting ... looks like their territory is contiguous as well.

From here: Sious Nation

In North America the territory of the Lakota, Nakota and Dakota Nation covers some 200,000 km2 in the present day state of South Dakota and neighboring states.

The Lakota, Nakota and Dakota Nation (also known as the Great Sioux Nation) descends from of the original inhabitants of North America and can be divided into three major linguistic and geographic groups: Lakota (Teton, West Dakota), Nakota (Yankton, Central Dakota) and Dakota (Santee, Eastern Dakota). The total number of native North Americans is approximately 1,5 million, of which around 100,000 are Lakota. They reside near the Sacred Black Hills of South Dakota.

The Lakota ("friends" or "allies", sometimes also spelled "Lakhota") are a Native American tribe, also known as the Sioux (see Names). The Lakota are part of a band of seven tribes that speak three different dialects, the other two being the Dakota and the Nakota. The Lakota are the western most of the three groups, occupying lands in both North and South Dakota. The Nakota, the smallest division, reside on the Yankton reservation in South Dakota, the Northern portion of Standing Rock Reservation, and Canada (the Stoney and Assiniboine), while the Dakota live mostly in Minnesota and Nebraska.