-
On this date a treaty was signed giving the US 828000 square miles of land, including most of Montana.
-
From 1805 to 1806 Lewis and Clark crossed and recrossed Montana on thier expedition to explore the Louisianna Purchase.
-
The Oregan Treaty gives the rest of Montana to the US.
-
Gold was Discoverd in Grasshopper Creek and a gold rush was started.
-
The open range cattle indusrty rises in Montana.
-
Copper mines became more common, especially in Butte, One company was Butte Copper Co.
-
The first steamboat reaches Fort Bentonon via the Missouri River
-
The Northern Pacific Railroad is completed throughout Montana.
-
Montana becomes the 41st United State.
-
The First Montanan hydroelectric dam is completed in Great Falls.
-
The Montana Capital building is completed in Helena
-
Glacier National Park is establishe by Congress.
-
Montana Women get the right to vote.
-
Multiple severe earthquakes strike central Montana, in the heart of the Great Depression.
-
The Petrolium boom in eastern Montana begins.
