aug 8, 1846 - WIlmot Proviso
Aug 8 1846, slavery issue
David Wilmot was trying to pass a law called Proviso that would have outlawed slavery in territories that United States aquired from Mexico as the result of Mexican-American war. All his attemps to get this law passed failed.
Added to timeline:
Timeline: Causes of the American Civil war by Veera Rakkolainen