Who abolitionist tried to seize a federal amity on behalf of his cause?

The abolitionist who attempted to seize a federal armory for his cause was John Brown. In 1859, he led an armed raid on the Harpers Ferry armory in Virginia, aiming to initiate a slave uprising and establish a stronghold for freed slaves. Brown's actions were ultimately unsuccessful, leading to his capture, trial, and execution, but they heightened tensions between the North and South and contributed to the onset of the Civil War.