Missouri: Polity Style: 1820-2026

6 Mar 1820	the inhabitants of southeastern portion of the Territory of Missouri are authorized to form a constitution and state government and to assume a name for the future State, to be admitted to the United States when formed, in accordance with an act passed by the Congress of the United States (House of Representatives on 1 Mar 1820, Senate on 2 Mar 1820 with amendments, House concurred in amendments on 2 Mar 1820) and signed into law on 6 Mar 1820 (Statutes at Large, 3:545-548) [1]
19 Jul 1820	the Constitution of the State of Missouri is adopted at a session of the Convention held at St. Louis on 17 Jul 1820 and signed on 19 Jul 1820 (Missouri Convention 1820, p. 46)
19 Jul 1820 -	State of Missouri
2 Mar 1821	the admission of Missouri to the Union is agreed upon, subject to the fulfillment of a certain condition, in accordance with a resolution of the Congress of the United States (passed by the House of Representatives on 26 Feb 1821, Senate on 28 Feb 1821), approved by the President of the United States on 2 Mar 1821 (Statutes at Large, 3:645) [2]
26 Jun 1821	the State of Missouri assented to the condition contained in the resolution of Congress approved on 2 Mar 1821, in accordance with an act passed by the General Assembly of Missouri (House of Representatives on 13 Jun 1821, Senate on 15 Jun 1821 with an amendment, House disagrees with the amendment on 16 Jun 1821, House and Senate agree to amendments proposed by joint committee of conference on the disagreement on 20 Jun 1821) and signed into law on 26 Jun 1821 (Missouri House Journal, 1821, Special session, pp. 79-81; Missouri Laws Revised and Digested, 1:68-69) [3]
10 Aug 1821	the admission of the State of Missouri to the United States is declared to be complete in accordance with a proclamation of the President of the United States of 10 Aug 1821 (Statutes at Large, 3:797)

Full title: An Act to authorize the people of the Missouri territory to form a constitution and state government, and for the admission of such state into the Union on an equal footing with the original states, and to prohibit slavery in certain territories.
Full title: Resolution providing for the admission of the state of Missouri into the Union on a certain condition. The condition of Missouri's admission related to certain clauses in the State constitution in respect to the migration of free blacks into the State.
Full title: A Solemn Public Act, declaring the assent of this state to "the Fundamental Condition" contained in a resolution passed by the congress of the United States, providing for the admission of the state of Missouri into the union, on a certain condition.