The first two days of the battle were bloody but indecisive. The army of the Potomac was then moved to Spotsylvania Court House, but on May 8 the rebels stalled the union from advancing. In the next 12 days, there was 18,000 union and 11,000 confederate casualties. On May 12, the union corps attacked the confederate mule-shoe salient at bloody angle. The union could never break the confederate defense line.