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In page Lake Champlain:

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The lake has long acted as a border between indigenous nations, much as it is today between the states of New York and Vermont. The lake is located at the frontier between Abenaki and Mohawk (Iroquois Confederacy) traditional territories. The official toponym for the lake, according to the orthography established by the Grand Council of Waban-aki Nation[citation needed], is Pitawbagok (alternative orthographies include Petonbowk[1] and Bitawbagok),[2] meaning "middle lake", "lake in between" or "double lake".