January 14, 1846
Morgan L. Martin, territorial delegate, introduced in the House of Representatives a bill to enable Wisconsin to adopt a constitution and form a state government.
Nation and worldGrade A · 1 independent source
The evidence
“On January 14, 1846, Morgan L. Martin, the delegate of the territory of Wisconsin in congress, introduced in the house of representatives a bill, authorizing the people of the Territory of Wisconsin to adopt a constitution and form a state government.”
1908-brown-rock-county/05-historic-evolution.md, Vol. 1, PDF p. 138 / book p. 123
Brown, William Fiske, editor. Rock County, Wisconsin: A New History of Its Cities, Villages, Towns, Citizens and Varied Interests, from the Earliest Times, Up to Date. Chicago: C. F. Cooper & Co., 1908. 2 vols. archive.org/details/rockcountywiscon01brow, archive.org/details/rockcountywiscon02brow.
Grade A: Found on a page of one of our sources