Question: When did louisiana become a part of the united states?
Disambiguated questions and answers: question: When did The Louisiana Purchase become part of the United States?
When did Louisiana join the Union?
answer: July 4 1803
April 30, 1812
question: When did the territory of Louisiana become a part of the United States?
When did the state of Louisiana become a part of the United States?
answer: July 4, 1803
April 30, 1812
Natural Questions answer: 20 December 1803 (from the Wikipedia article "Louisiana Purchase")