; . Washington D.C. Business Directory The Wilmot Proviso banning slavery in any new territory to be acquired from Mexico not including Texas which had been annexed the previous year it passed the House in August 1846 and February 1847 but not the Senate Later an effort failed to attach the proviso to the Treaty of Guadalupe Hidalgo. . .
! Mexican territorial claims relinquished in the Treaty of Guadalupe Hidalgo in white Compromise of 1850 February 1 1784.
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