When did the states became states?

The border states of Maryland (November 1864) and Missouri (January 1865), one of the Confederate states, Tennessee (January 1865), and the new state of West Virginia (February 1865), abolished slavery just prior to the end of the Civil War (May 1865). read more

The first 13 became states in July 1776 upon agreeing to the United States Declaration of Independence, and each joined the first Union of states between 1777 and 1781, upon ratifying the Articles of Confederation, its first constitution. read more

The first 13 became states in July 1776 when they agreed to the United States Declaration of Independence. Each of those 13 agreed to the first U.S. constitution, called the Articles of Confederation, which formed the first Union of states between 1777 and 1781. read more

The first 13 states effectively became states with the proclamation of the Declaration of Independence on July 4, 1776, and all 13 with the ratification (by nine states) of the US Constitution in 1788 (New Hampshire, June 21, 1788). The other states were admitted as separated parts of existing states or as new territories. read more