 John C. Frémont replaced Lyon as commander of the Department of the West.Following the Battle of Wilson's Creek, he imposed martial law in the state and issued an order freeing the slaves of Missourians who were in rebellion.The property, real and personal, of all persons in the State of Missouri who shall take up arms against the United States, and who shall be directly proven to have taken active part with their enemies in the field, is declared to be confiscated to the public use; and their slaves, if any they have, are hereby declared free.