Vlad usually had a horse attached to each of the victim’s legs and a sharpened stake was gradually forced into the body. The end of the stake was usually oiled and care was taken that the stake not be too sharp, else the victim might die too rapidly from shock. Normally the stake was inserted into the body through the buttocks and was often forced through the body until it emerged from the mouth. However, there were many instances where victims were impaled through other body orifices or through the abdomen or chest. Infants were sometimes impaled on the stake forced through their mother’s chests. The records indicate that victims were sometimes impaled so that they hung upside down on the stake. Vlad Tepes often had the stakes arranged in various geometric patterns. The most common pattern was a ring of concentric circles in the outskirts of a city that was his target. The height of the spear indicated the rank of the victim. The decaying corpses were often left up for months. It was once reported that an invading Turkish army turned back in fright when it encountered thousands of rotting corpses impaled on the banks of the Danube. In 1461 Mohammed II, the conqueror of Constantinople, a man not noted for his squeamishness, returned to Constantinople after being sickened by the sight of twenty thousand impaled Turkish prisoners outside of the city of Tirgoviste. This gruesome sight is remembered in history as "the Forest of the Impaled."