What was the border between slave and free states west of the Missisippi River?
- atwilLv 51 decade agoFavorite Answer
From 1820 until 1857 it was 36.5 degrees N, with the exception of Missouri which was a slave state. This line was fixed by Congress in the Missouri Compromise (1820) but was overturned by the Supreme Court in Scott v. Sanford (1857).
- Anonymous1 decade ago
The Rio Grande. The only state west of there was California.