When did governor francis pickens demand that the union surrender fort sumpter?

Governor Francis Pickens of South Carolina demanded the Union surrender Fort Sumter on April 11, 1861. This ultimatum was part of the escalating tensions leading up to the American Civil War, as the Confederate states sought to assert their control over federal properties in the South. When the Union forces refused to comply, it set the stage for the Confederate bombardment of the fort, which began on April 12, 1861.