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Organization of Montana Territory

When
May 26, 1864
Where
Montana Territory
Part of
Montana Territory organized from Washington and Dakota territories

Congress passed the Organic Act, and President Lincoln signed it into law on May 26, 1864, creating Montana Territory from parts of Idaho, Washington, and Dakota territories.

The Act of Congress, known as the Organic Act, established Montana as an organized incorporated territory. It drew from areas previously part of Idaho, Washington, and Dakota territories. The legislation prescribed a standard government structure, including a governor, secretary, and supreme court, appointed by the President with Senate consent.

Sources

  1. Montana Territory Wikipedia, revision of 2026-05-26

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.