answersLogoWhite

0

Maine became a state on March 15, 1820. But the final border was not established until August 9, 1842 as part of the Webster-Ashburton Treaty. The territory was US possession at the conclusion of the revolutionary war, but was ambiguous in its exact borders and was fought over again during the War of 1812.

User Avatar

Wiki User

15y ago

What else can I help you with?