At 11:30 a.m. Osterhaus rode north through a belt of timber onto Foster Farm and witnessed an astonishing sight. McCulloch's entire division was marching east on Ford Road only a few hundred yards away. Despite the odds, Osterhaus ordered Bussey's small force to attack to buy time for his infantry brigade to deploy. Three Federal cannon began shelling the Southerners, killing at least ten. McCulloch wheeled McIntosh's 3,000 horsemen to the south to attack. The massed Confederate charge overwhelmed Bussey's force, stampeding them and capturing the cannons. A little further west, two companies of the 3rd Iowa ran into a Cherokee ambush and were similarly routed. The Iowa unit's unusual killed-to-wounded ratio, 24 killed and 17 wounded, suggests that the Native American warriors killed a number of wounded Northerners. "Some, perhaps all, of Trimble's wounded Iowans were murdered and at least eight were scalped."