Lee's invasion and his seizure of free blacks, who were shipped south and sold into slavery, had the unintended effect of mobilizing northern Republicans and tarring the peace Democrats as traitorous "Copperheads" who refused even to resist the invasion of their homes. Antiwar protests occasionally turned | Lee's invasion and his seizure of free blacks, who were shipped south and sold into slavery, had the unintended effect of mobilizing northern Republicans and tarring the peace Democrats as traitorous "Copperheads" who refused even to resist the invasion of their homes. Antiwar protests occasionally turned |