The Montana Territory was established in 1864, created from parts of the Oregon Territory and Dakota Territory. It became a significant area for settlers and miners during the westward expansion of the United States, particularly due to the discovery of gold and silver in the region. The territory was officially organized in 1865 and included present-day Montana and parts of North Dakota and South Dakota. In 1889, the Montana Territory was admitted to the Union as the state of Montana. The territory's capital was initially located in Virginia City, which was a bustling mining town. The rich natural resources and diverse landscapes of the area contributed to its development and growth during the late 19th century.