Mississippi: Polity Style: 1817-2026

1 Mar 1817	the inhabitants of the western part of the Mississippi Territory 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 (Senate on 31 Jan 1817, House of Representatives on 26 Feb 1817 with amendments, Senate concurred in amendments on 27 Feb 1817) and signed into law on 1 Mar 1817 (Statutes at Large, 3:348-349) [1]
15 Aug 1817	the Constitution of the State of Mississippi is adopted at a session of the Convention held at the town of Washington on 12 Aug 1817 and signed on 15 Aug 1817 (Mississippi Convention 1817, pp. 101-103, 105-106)
15 Aug 1817 -	State of Mississippi
10 Dec 1817	Mississippi is admitted to the United States in accordance with a joint resolution passed by the Congress of the United States (Senate on 3 Dec 1817, House of Representatives on 8 Dec 1817) and approved by the President of the United States on 10 Dec 1817 (Statutes at Large, 3:472-473) [2]
9 Jan 1861	Mississippi seceded from the United States in accordance with an ordinance passed by the Convention of the People of the State of Mississippi on 9 Jan 1861 (Mississippi Convention 1861, pp. 8-13, 45-46) [3]
8 Feb 1861	Mississippi formed part of the Confederate States of America on the date when the Constitution for the Provisional Government of the Confederate States of America was approved by the Congress and came into operation (Confederate Congress Journal, 1:39; Confederate Statutes at Large, 1-8)
22 Aug 1865	the ordinance of secession of 1861 is declared to be henceforward null and of no binding force in accordance with an ordinance passed by the Convention on 22 Aug 1865 (Mississippi Convention 1865, 225)
23 Feb 1870	Mississippi is re-admitted to representation in the Congress of the United States in accordance with an act passed by the Congress of the United States (House of Representatives on 3 Feb 1870, Senate on 17 Feb 1870), signed into law on 23 Feb 1870 (Statutes at Large, 16:67-68) [4]

Full title: An act to enable the people of the western part of Mississippi 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.
Full title: Resolution for the admission of the State of Mississippi info the Union.
Full title: An Ordinance to dissolve the Union between the State of Mississippi and other States united with her under the Compact entitled, "The Constitution of the United States of America."
Full title: An Act to Admit the State of Mississippi to Representation in the Congress of the United States.