The US Civil War is considered to have begun on April 12, 1861, when Confederate forces fired upon Ft. Sumter in the harbor of Charleston South Carolina. Kansas was admitted to the Union on January 29, 1861 - about 2½ months prior to that. The next state admitted to the Union was West Virginia - which was split from Virginia June 20, 1863 - more than 2 years after the start of the Civil War
The last state to join the Union before the US Civil War was Kansas. It was previously a US Territory. Kansas attained statehood on January 29, 1861.
West Virginia
Kansas joined the union a few months prior to the beginning of the Civil War. Kansas was admitted into the Union on January 29, 1861 becoming the 34th state to join the Union.
Florida
Nebraska- In 1867 it was the 37th state to join the Union.
Nebraska was the first state admitted into the union after the civil war. Nebraska was admitted into the Union on March 1, 1867 becoming the 37th state to join the Union.
No state was admitted into the union prior to 1997. Delaware was admitted into the Union on December 7, 1787 becoming the 1st state to join the union.
No state joined the union prior to 1787. Delaware was admitted into the Union on December 7, 1787 becoming the 1st state to join the union.
West Virginia
During the Civil War, Washington wanted to join the Union as a "Free State"
The state of Kansas was formed just prior to the Civil War. The state of Texas also became part of the United States just before the Civil War and then promptly seceded to join the South.
Ohio entered the union prior to Iowa. Ohio was admitted into the Union on March 1, 1803 becoming the 17th state to join the Union. Iowa was admitted into the Union on December 28, 1846 becoming the 29th state to join the Union.
Tennessee was the fist southern state to rejoin the Union after the Civil War. Nebraska was the first new state to enter the United States of America. It is number 37, joining on March 1st, 1867.