In April and May 1813, Procter besieged Harrison at Fort Meigs, Ohio. His artillery pounded the fort for days but the muddy ground inside the fort absorbed most of the cannonballs. On 5 May 1813, at the Battle of the Miami Rapids, Procter and the Indians inflicted a devastating defeat on Brigadier-General Green Clay's brigade of Kentucky militia, who were trying to reinforce the garrison. A sortie from the fort by Harrison's command was also turned back. Many American prisoners were taken, and 38 wounded men who had been captured were moved to the disused Fort Miami. Once again, some of the wounded prisoners were massacred by Indians who had arrived too late to take part in the battle. The Shawnee chief Tecumseh reviled Procter for his failure to prevent the killings. The siege ultimately ended in failure, as did the subsequent Battle of Fort Stephenson.