Answer: Albany Plan
The Albany Plan of Union was one of many attempts to unify the colonies under one government. It was created by Benjamin Franklin, then delegate of Pennsylvania, at the Albany Congress on July 10, 1754 in Albany, New York.
The Plan called for a general government that was to be administered by a President General that was appointed by the Crown and a Grand council of delegates nominated by the colonial assemblies, roughly to match colony size. Each colony, however, would only have one vote and decision making would be by unanimous consensus.
Copies of the Plan were sent to the Colonial Assemblies and the Board of Trade in London, however, they both rejected the Plan.
U.S. treaties and international agreements currently in force (i.e., excluding those, some of which are included on this page, that are no longer in force, and that are signed but not ratified or otherwise have not yet entered into force), divided between (1) bilateral treaties organized by state and then by topic, and (2) multilateral treaties organized by topic, see the annual State Department publication.
I have an incomplete list but I hope it helps.
Contents
1 Pre-Revolutionary War treaties
2 U.S. international treaties
2.1 1776–1799
2.2 1800–1849
2.3 1850–1899
2.4 1900–1949
2.5 1950–1999
2.6 2000–current
3 U.S.–Native American treaties
3.1 1778–1799
3.2 1800–1809
3.3 1810–1819
3.4 1820–1829
3.5 1830–1839
3.6 1840–1849
3.7 1850–1859
3.8 1860–1869
3.9 1870–1879
3.10 1880–present
Hope this helps! ^^
They were allowed to rejoin if they accepted the 13th amendment. It was one of the reconstruction amendments that ended slavery and gave led to African-Americans getting their voting rights and their freedom.If they wouldn't accept it they wouldn't be allowed back.