Which Side of Black History is Delaware On?Delaware was a slave state on the Mason-Dixon line. All efforts to abolish slavery in Delaware prior to the Civil War failed due to a small number of Delawareans who were slave owners with an outsized political influence. The Emancipation Proclamation only applied to the Confederate States. President Abraham Lincoln knew that slavery must be abolished in all the states, but in order to do that, the Constitution had to be amended — so the 13th Amendment was proposed to abolish slavery outright. On June 19, 1865, Union troops arrived in Texas and proclaimed freedom for enslaved persons in that state, a date now a federally-recognized [holiday] to honor the occasion. But even after Juneteenth, and the end of the Civil War, Delaware took no action to make slavery unlawful. Those enslaved in Delaware remained in bondage until December 6, 1865, when the 13th Amendment was declared ratified, without Delaware’s concurrence.